Last Updated: 21/02/12 7:07pm
The final whistle goes and that last-minute goal has kept this tie very much alive at 1-1, giving CSKA hope ahead of the second leg in Spain.
GOAL CSKA snatch an equaliser out of the blue in the dying seconds of the game, as Wernbloom volleys home from close range after Real fail to clear a cross into the area.
There is a moment of hesitation from Casillas as CSKA launch the ball forward, but Pepe has been impressive all the way through the game and he has the composure to deal with the danger.
Real retain possession in midfield as they look to tick the clock down to full-time, with three minutes of stoppage time to be played.
CSKA try and commit a few more bodies to attack in their pursuit of an equaliser but Real's organised defence has rarely looked like been breached tonight.
Real win a couple of corners in quick succession but Chepchugov is a commanding presence in his own area and takes charge of the situation.
Ozil is replaced for the final few minutes and it is Raul Albiol who comes on to shore things up in midfield.
The ball breaks for Ronaldo just outside the CSKA area but he drills his effort narrowly wide of Chepchugov's right-hand post.
Oliseh exchanges passes with Doumbia down the CSKA right before being brought down by Coentrao, who appeared to get a bit of the ball but has instead been hit with a yellow card after conceding a free-kick.
A mistake from Coentrao presents CSKA with a chance but they are just missing a cutting edge and, crucially, none of their opportunities have landed at the feet of leading scorer Doumbia.
Honda skips away from a couple of challenges in midfield before playing the ball out wide to Oliseh, who is criminally offside.
Chepchugov has been magnificent for CSKA tonight and he does well again here to deny Ronaldo after the Portuguese forward had beaten the offside trap.
Callejon goes off to be replaced by Kaka as Mourinho brings on a bit more experience for the final quarter of an hour.
Ramos receives a yellow card for a foul in his own half as Real come under a bit of pressure in the closing stages.
Oliseh shows good skills down the right to create a yard of space and then crosses for Dzagoev to try an ambitious bicycle kick, but his high boot is dangerously close to Callejon's face and the referee awards Real a free-kick.
CSKA win a free-kick in a dangerous area and Honda tries his luck with a curling effort, which is comfortably held by Casillas.
CSKA make another change as the ineffective Evgeni Aldonin is replaced by the much more attack-minded Keisuke Honda, who is only just back after a long injury lay-off.
CSKA boss Slutsky makes his first change of the evening and it is a surprising one, with the impressive Musa replaced by Sekou Oliseh.
Musa has been the danger man for CSKA and he threatens again with a fine run and cross that is easily saved by Casillas, and perhaps a square pass to a team-mate would have been a better option.
CSKA temporarily release the shackles and win a corner, but they fail to make the most of it as Aleksei Berezutski concedes a free-kick.
Pepe delivers a decent pass forward which Higuain initially does not appear to be interested in, before belatedly continuing the chase and keeping the attack going.
Central midfield is always a key battleground but it is also a very congested area and both sides are scrapping for control just at the moment.
Higuain makes a good run down the right-hand channel and is almost picked out by a pass from deep, but Chepchugov is again alert to the danger and rushes out to boot the ball clear.
Real have picked up the tempo over the past few minutes and if they can find a second away goal it could well prove decisive.
Ronaldo and Callejon combine yet again as both players show good skill, but the latter's final shot is blocked by Chepchugov.
Ronaldo plays in Callejon with a clever pass but he misses the target from just a few yards out, even though it was quite a tight angle.
Callejon is caught in possession and CSKA enjoy a period of passing in Real territory, but they cannot find the killer final ball.
Musa is left clutching his shin after receiving a kick from Xabi Alonso, who becomes the first player into the book tonight.
CSKA, meanwhile, will feel they need to salvage something better from this first leg, and there is plenty of urgency about the Russians as the second half gets underway.
Real get the second half started and they will be determined to protect this 1-0 advantage ahead of the second leg in Spain.
The whistle goes for half-time and, while CSKA may have started brightly and finished with a minor flourish, it is Real who are well and truly in charge of the tie thanks to Ronaldo's 28th-minute away goal.
Musa provides an attacking spark for CSKA once again with a lively run down the right wing, as two additional minutes are signalled at the end of the first half.
Real's defenders allow a loose ball to trickle back to Casillas but they are nearly embarrassed as the lightning-quick Musa nearly latches on to it first.
Callejon kicks out towards Tosic after losing the ball but the referee decides to keep his cards in his pocket once again.
A promising Real attack comes to nothing when the flag is raised for offside, as CSKA look to survive until half-time and then regroup.
Doumbia challenges for a high ball with Alvaro Arbeloa in the Real area but fails to make much of a connection and it loops behind for a goal-kick.
Ronaldo appeals for handball against CSKA after a powerful effort from distance is blocked, but there did not appear to be anything intentional.
There is some confusion in the Real defence as Iker Casillas comes running out of his area to try and reach a long ball but Doumbia gets there first. Fortunately for Real, Pepe had stayed with the striker and was able to force him out wide, allowing Casillas to retreat to the safety of his box.
Real dice with danger by passing it around too casually just outside their own area, but CSKA are not able to capitalise on this occasion.
There are appeals for a CSKA penalty, mostly from the crowd, as Dzagoev goes down under pressure from Coentrao, but the referee waves play on and it just looked like strong defending from the replays.
Ronaldo threatens to make it two as he races away down the right wing, but for once his touch lets him down and CSKA survive.
Real had just started to exert some pressure prior to that breakthrough from Ronaldo and CSKA now have a mountain to climb after conceding an away goal.
GOAL Tosic makes a mess of trying to clear a cross into the CSKA area and Ronaldo takes full advantage to rifle a precise finish past Chepchugov and into the bottom corner.
Ronaldo has been quiet so far tonight but he gets into the action here with a devilish cross from the right wing, after a couple of step-overs, which Chepchugov comes out to claim.
Fabio Coentaro tries to release Jose Callejon with a long pass but it is over-hit and there is no chance of him getting on the end of it.
The game has become bogged down in midfield over the last few minutes, with a number of fouls causing regular stoppages.
Real still appear a yard off their usual pace as they struggle to get to grips with the alien conditions.
Tensions almost boil over as players from both sides confront each other angrily following an aerial challenge by Pontus Wernbloom on Higuain.The situation is quickly defused by referee Bjorn Kuipers, though, and no yellow card is shown.
Higuain is denied by Sergei Chepchugov following a slick attack by Real, and the goalkeeper reacts quickly to pull off a second superb save from Khedira on the rebound.
Gonzalo Higuain is called up from the bench to replace the injured Benzema, and that is a blow for Real after just a quarter of an hour.
Karim Benzema stays down with what looks like a groin injury and the physios rush on to administer treatment, but it looks like Mourinho will be forced into an early substitution.
Sami Khedira charges forward on a direct run but cannot beat the second defender as CSKA hold a high line at the back.
Real relieve the pressure with a period of passing in midfield but they have looked a little vulnerable in the opening stages.
Musa's speed again poses problems for the Real backline as he sprints into the area, but Pepe shows good discipline to cover across and make the tackle.
Georgi Schennikov does well down the left to skip away from his defender and cut back a menacing cross, which Dzagoev fires wide after getting himself in a horrible position.
CSKA teenager Ahmed Musa troubles the Real defence with his pace as he bursts down the right, and wins a free-kick following a foul by Ramos.
There is not much fluency about the game during the early stages, with both sides looking to close down their opponents immediately and Cristiano Ronaldo already on the receiving end of a meaty challenge.
Mesut Ozil goes down following a clash in midfield to cause some concern for Mourinho, but he is fine to carry on.
Sergio Ramos surrenders possession with a sloppy sideways pass and CSKA try to spring forward quickly, but the attack fizzles out.
The home side enjoy a brief period of possession before losing the ball to Real, who look like they are ready to be patient in their build-up play.
CSKA get the game started and let us hope for an exciting spectacle, even though the conditions are sure to play a part, with freezing conditions and an artificial pitch at the Luzhniki Stadium.
CSKA have not played a competitive match since the turn of the year, with the Russian league currently having a mid-season break. Leonid Slutsky has a number of interesting players at his disposal, though, including the prolific striker Seydou Doumbia, highly-rated playmaker Alan Dzagoev, former Manchester United winger Zoran Tosic and identical twins, Aleksei and Vasili Berezutski, in defence.
Philip John Barber writes: "Let's hope Real start with all guns blazing so that an early goal sparks the blue touch-paper on this fixture! If Alonso has a good game Real should take a lead back to the Bernabeu."
Ryan Williams is the first to get in touch, saying: "I don't think the cold weather will affect Madrid tonight. I can't imagine anything less than 3-0. Ronaldo first goal."
CSKA Moscow: Chepchugov, Alexei Berezutsky, Ignashevich, Vasili Berezutsky, Shchennikov, Wernbloom, Aldonin, Musa, Tosic, Dzagoev, Doumbia. Subs: Revyakin, Semberas, Honda, Rahimic,Oliseh, Kim, Necid.
Real Madrid: Casillas, Coentrao, Pepe, Ramos, Arbeloa, Alonso, Khedira, Ronaldo, Ozil, Callejon, Benzema. Subs: Adan, Carvalho, Kaka, Granero, Marcelo, Albiol, Higuain.
Get in touch with your views and predictions at Lewis.Rutledge@bskyb.com or via Twitter @SkySportsLewis. Can CSKA make the most of home advantage and build a lead to take into the second leg, or will Real prove too strong tonight? What kind of match are you expecting? The full team news will be in shortly but who do you think are likely to be the key players?
Welcome to our minute-by-minute commentary of the UEFA Champions League clash between CSKA Moscow and Real Madrid. Jose Mourinho's men are one of the favourites to go all the way in Europe this season, having cruised through their group campaign with maximum points and established a big lead over Barcelona in the Primera Liga. However, an away game in the Russian capital is always a daunting trip and CSKA have shown what a dangerous side they can be already this term.