Last Updated: 23/10/12 8:16am
The referee brings the game to an end and it finishes 0-0 at Celtic Park as both sides have to settle for a point.
From the corner the ball deflects off Wanyama and just wide for another corner. From the second corner Cardozo finds space inside the box, but he cannot direct his header on target.
Celtic trying to exert from presure on the home defence. They have claims for a penalty as Forrest goes down in the box under pressure from Melgarejo, but the home side's appeals are waved away.
Common's corner is right under the crossbar, but Rogne is adjudged to have fouled the keeper Artur and awards Benfica a free-kick.
Celtic win a corner as they go in search of a breakthrough. Good defending from Benfica as they snuff out Miku inside the box.
Lucky escape for Celtic as they fail to deal with a long throw-in and the ball bounces right across the six-yard box before it is finally cleared.
Good thinking from Commons as he spots Artur off his line and he tries his luck from just inside his own half, but his effort is caught by the keeper.
The ball drops to Salvio on the edge of the box, but his effort is well over the top as it remains goalless.
Celtic win three corners in quick succession, but the Benfica defence hold tight to keep the home side at bay.
Commons' cross is deflected towards his own goal by Matic, but Artur is alert to collect the ball at his near post.
Forster is called into action to produce a smart save at his near post to keep out Garay's header from Aimar's corner. Benfica having their best spell of the game so far.
Great move from Benfica involving Aimar and Rodrigo and as the ball breaks to Gaitan, Brown makes a vital block to divert his shot behind for a corner.
Celtic win a free-kick out on the left as Izaguirre is felled by Salvio. Commons' free-kick is punched clear by Artur to Matthews who sees his volley deflected behind for a corner.
Good run from Forrest down the right, but his cross is poor and is easily cleared by the Benfica defence.
Good defending from Wilson up against Rodrigo who then fouls the defender to give Celtic a free-kick to clear their lines.
Wanyama who has already been booked is walking a tightrope after bringing down Gaitan, but the referee decides not to book the midfielder for the offence.
Superb turn from Commons on the edge of the box, but his shot with his weaker right foot is blocked by Garay.
Who will be the happier of the two managers after the first half? What changes should either manager make to their sides? You can mail me your thoughts via the Score Centre, email me direct on email@example.com and you can also now Tweet me: @skysportspeteo
Half-time: There is no added time at the end of the opening 45 minutes as the referee brings the first half to a close and it is 0-0 at the break.
Benfica win a free-kick just inside the Celtic half as Commons is adjudged to have fouled Perez. Aimar's free-kick towards the penalty spot is easily saved by Forster.
Great challenge from Wilson as Benfica almost catch Celtic on the counter attack from their own corner.
Gaitan is rolling around the pitch after a tangle with Brown, but the referee is not interested. That was poor from the Benfica man trying to get Brown in trouble.
Wasted opportunity from Benfica as Salvio robs Izaguirre of the ball, but as he plays in Rodrigo the striker is caught offside much to the relief of the Celtic defence.
From the free-kick the ball drops to Perez on the edge of the box, but his shot flies over the crossbar.
Great chance for Benfica as Aimar plays in Rodrigo with a terrific through ball, but Forster is out quickly to out the striker under pressure and he can't get enough power on his shot to trouble the Celtic goal. Rodrigo then appeals for a penalty after Forster caught Rodrigo with the follow through, but nothing doing from the referee.
30 minutes gone and neither goalkeeper has been tested as yet with both sides struggling to create chances.
Wasted opportunity from Commons with a free-kick in the middle of the park as his low cross is easily cleared by the Benfica defence.
Garay is given a ticking off by the referee for going through the back of Commons. Chance for Celtic to deliver a good ball into the box. Commons' cross towards Wanyama is well defended and Benfica win a goalkick.
Benfica win another corner and they work it short to Salvio, but Brown makes a good challenge to win the ball for the home side.
Miku tries to pick out Commons inside the box, but his cross is well blocked by Jardel in what was a dangerous situation for Benfica.
Wanyama is the first player to be booked as he hauls back Perez as he tries to race clear in midfield.
Benfica starting to settle now and they win another corner as Matthews blocks Gaitan's attempted cross. From the corner Celtic clear the danger as Matic fails to control the ball inside the box.
Good defending from Lustig as he knocks behind Almeida's cross for a corner. From the corner the ball is played out to Salvio who blazes his shot wide of the target.
Celtic win a free-kick as Miku is fouled by Jardel, but Commons' delivery is comfortably cleared by the Benfica defencer before Forrest runs the ball out of play.
Great tackle from Wanyama in the middle of the park to deny Salvio as he tries to set up a counter attack from Benfica.
Garay is caught in the face by Wanyama, but the Benfica defender is okay to continue. Celtic trying to press Benfica every time they are on the ball. Encouraging start for the home side.
Chance for Benfica as they win a free-kick 30 yards from goal as Aimar is felled by Brown. Aimar takes the free-kick, but his cross is overhit and runs out of play.
Commons' corner is cleared for another corner from the other side. The ball almost falls to Wanyama, but Benfica manage to clear the danger.
Good opening for Celtic as Miku tees up Commons inside the box, but he drags his shot and his effort is blocked by the Benfica defence.
Early ambitious effort from Commons as he tries to chip Benfica goalkeeper Artur from the edge of the box, but his effort sails over the crossbar.
The teams are out on the pitch and there is a great atmosphere at Parkhead as Celtic play their first Champions League group match in four seasons.
We are getting ever closer to kick-off. Any score predictions? You can mail me via the Score Centre, email me direct on firstname.lastname@example.org and you can also now Tweet me: @skysportspeteo.
Joe Smyth in Ballymena is surprised Hooper has been dropped to the bench as he was not impressed by Miku against St Johnstone at the weekend. Could this backfire on Lennon?
Benfica have also taken a gamble by leaving star striker Oscar Cardozo on the bench. Who will be Benfica's dangermen tonight?
Big decision from Neil Lennon to leave Gary Hooper on the bench with Miku starting up front. Do you think he has got this right?
You can get in touch with your thoughts, predictions, opinions and jokes (within reason) throughout the course of the evening and I will do my best to publish those that make me think or laugh. Contact me at peter.O'Rourke@bskyb.com or via twitter @SkySportsPeteo
Benfica starting XI: Artur, Garay, Jardel, Andre Almeida, Aimar, Gaitán, Matic, Perez, Salvio, Rodrigo, Melgarejo
Celtic starting XI: Forster, Matthews, Izaguirre, Wilson, Lustig, Mulgrew, Forrest, Brown, Wanyama, Commons, Miku
Hello and welcome to our minute-by-minute commentary of Celtic's Champions League game against Benfica from Celtic Park.