Last Updated: 06/04/13 4:56pm
Giroud's long-range attempt skims wide of Foster, who launches a desperate counter-attack of inside his own moments later. He manages to carry the ball over the halfway line, but his cross into the area is cleared by the defence and Webb's final blow of the whistle couldn't come soon enough for the Gunners.
The last thing the Gunners need to be doing is giving the ball back to the Baggies, but that is exactly what Giroud does.
Absolute agony for Arsenal's fans as Albion dig deep and show no mercy on attack, the visiting defence having to work over-time trying to pluck the gaps.
Five minutes extra shown by the touch official, with the added time allowing Yacob to miss his opportunity on goal.
Rosenberg throws his head back in disappointment as he just misses out on toe-poking his side back on level terms.
Yacob, Brunt and Morrison all combining to try and put away one of Lukaku, Long or Rosenberg waiting in the box.
The match becoming a little scrappy as well as Ridgewell picks a yellow card for an unnecessary foul.
Super-chance for Lukaku has he fires his shot from close-range wide of the right post with Fabianski rooted to the spot.
McAuley gets above Koscielny at the far post to get his head to Morrison's set-piece from the left, but the ball bounces inches wide of the post.
Arteta and Cazorla look to instigate a forward thrust that result in Long taking out Rosicky with a cynical challenge.
The Baggies with the lion's share of the possession right now and are making significant movement inside the final third.
Liam Ridgwell finds Lukaku with a good ball, with replacement striker's shot just flying over the crossbar.
Morrison does well to get behind the defence out on the left, but his ball along the by-line into the box is smothered by Fabianski.
With the one-man numerical advantage, the Baggies have received a life-line as they look to maybe equalise, or even win this match.
GOAL! No mistake from Morrison, although Fabianski should've down better has he got his right hand to the ball after diving to the right side.
The game is turned on its head as Mertesacker receives his marching orders for bringing down Long inside the box.
Long does well to create some room to shoot, but he can't crack the defence who manage to scramble to make the block.
Delay in play as Long receives treatment, and Brunt waits patiently for the set-piece to take place.
Lovely quick feet from Morrison has the Albion man in a good position inside the box to shoot, but it's Per Mertesacker who manages to halt his run. However, the German defender does look to have handled the ball on the ground.
Dorrans' corner-kick from the left is punched clear by Fabianski, who also connects with the head of McAuley.
Long trying to create something on his own up front, but he needs support otherwise he just loses the ball with defenders swarming around him.
Play bogged down on the halfway line as the home side venture up with more urgency in attempt to force the visitors off the ball.
The Gunners not rushing their play as Nacho Monreal passes back towards Fabianski to get things going again with a big hoof up field.
Arsenal looking evermore confident on the ball as the two-goal cushion affords them a little leeway pushing up.
Romelu Lukaku looks to be warming up on the sidelines, with his introduction for the Baggies likely to change matters in attack which they so desperately need.
GOAL! Rosicky scores again, his initial powerful shot is palmed out by Foster, but he can't stop the Gunners attacker's reaction.
Breakout from Sagna, who then feed Gervinho, with the Ivorian obliging with a return ball that Sagna fires in on goal only for Foster to rush off his line and make a telling stop with his legs at the near post.
Arsenal with the early play going forward as they work the ball through phases inside the final third.
Can West Brom turn things around after the break? The Baggies are 12/1 to win now with the draw 4/1 while Arsenal are 2/9 to hold on for the victory.
I'm going for a comfortable 2-0 win for the gunners. With Arsenals recent form, West Brom don't stand a chance. Regards- Ben Townshend
Arsenal really need this game to fully return to form - and I think that with a good result today, we can hope to make the final push and ultimately get ourselves back in to the Top 4. I'm thinking a solid 2-0 win for the Gunners today. Cheers Alex Heath
It will be a slender advantage for the Gunners to take into the second stanza, but an advantage nonetheless.
West Brom with a late attacking opportunity in the opening half from the corner-kick, but Arsenal have the men at the back to deal with danger.
Great interplay between Giroud, Arteta and Cazorla sets up Ramsey, who must be wondering how he missed making it two-nil for the visitors from inside the area.
Dorrans spots the run of Billy Jones out on the right and puts through a searching ball for his team-mate to chase.
Arsenal fail to make anything of their corner-kick from the left, or Gervinho's attempt at getting around the defence on the rebound.
Dorrans' attempt on goal is blocked, but Albion area asking questions of Howard Webb after the referee overlooked Yacob's appeal for a penalty on the edge of the box after his clash with Koscielny.
Decent ball out to the right for James Morrison from Long, but the former is beaten to the ball by the defence.
Long getting a little frustrated on his own up front as the earlier good service as ground to a halt.
Giroud getting more into the game now as the Frenchman contests strongly for anything aerial on attack.
Olivier Giroud apologises to Gervinho for a poor ball forward that would've put the latter through on goal had it not been easily intercepted by the defence.
Good save with his feet from Foster denies Gervinho at the near post after the Ivorian made an angled run from the right flank.
Long looks to chase Gareth McAuley's ball from the right, but he invariably pulls up knowing he'll be flagged offsides.
Good strike from the set-piece from Brunt, but Fabianski gets down low to his left to make the smothering save.
Rosicky gives away a free-kick in a good area for the Baggies after a sloppy challenge from the goalscorer.
Albion launching long balls forward for Thomas and Long to try and get on the end of, but to no avail.
Likely buoyed by their opening goal, the Gunners are bossing the midfield with Arteta having free reign at the moment.
Arguably against the run of play, but Arsenal boss Arsene Wenger won't be complaining about his side getting the advantage on the scoreboard.
GOAL! Rosicky gets the breakthrough after reacts sharply in the box after Gervinho's attempted shot falls into his path. But the credit must go to Mikel Arteta's initial ball forward to get everything going.
Thomas chases down a long ball forward, but Sagna does well to ward off the pressure and clear the danger.
Long, again, on the ball and this time looks to create space to shoot, but his effort is way off the mark.
Ben Foster gathers a long ball forward with ease and looks to launch his side forward with a deep return from the back.
Yacob has two good chances to open his account for the Baggies in the space of seconds, one at the near post from the corner and the other outside the box after a poor clearance.
West Brom get the first two corner-kicks of the match and the Gunners are on the back-foot trying to clear their lines.
Rosicky's ball out to the left for Santi Cazorla is too long and the defence manages to clear it back up field.
Albion carry the ball up strongly, but are forced back inside their own half by the visiting defence.
Rosicky snatches at his shot on goal from the edge of the box, despite having enough time to compose himself and take aim
Chris Brunt's ball up field for Shane Long is blocked with the Albion ace making a good run into space.
The Gunners on the ball and Tomas Rosicky earns them a free-kick after Claudio Yacob brings him down just over the halfway line.
Despite the absence of Jack and Theo, there is undoubtedly enough quality in our squad to bag the three points today. Here's to a 2-0 win for Arsenal and a stride into the top four! Brett O'Brien Letchworth Garden City, Hertfordshire.
Arsenal are going to finish in the top 4 as they have come into good form! West Brom doesn't stand a chance if we play how we have being playing! Craig Hudson
I can see a comfortable win for the gunners in this on, 1-3 with giroud netting twice and santi cazorla getting one. COYG Regards Gavin Salter
Strange decision that lukaku is not playing but it would be really tough for us when lukaku comes on and attacks our tired defenders. I have a feeling the gooners will get one point today. Arun Chandradeva
Feel free to e-mail your thoughts or predictions to email@example.com and we'll publish as many of them before - and during - the game as possible.
The hosts will be without Youssouf Mulumbu, who saw red in the 3-1 defeat to West Ham last time out, while George Thorne and Zoltan Gera (both knee) are absent through injury. However, James Morrison (hamstring) has passed a late fitness test and will take up his place in the starting XI for the Baggies.
The big absentee for Arsenal is Abou Diaby, will be missing for the rest of the season after suffering his 38th major injury for the side, rupturing anterior cruciate ligaments during training this week. The Gunners are also without Jack Wilshere (ankle) and Theo Walcott (groin), but both Kieran Gibbs (illness) and Nacho Monreal (knock) have passed late fitness tests.
West Brom are rated at 16/5 to beat Arsenal today according to our friends at Sky Bet, the Gunners at 5/6 to pick the win, while it is 13/5 for the match to end in a draw.
The Baggies, meanwhile, have endured a rough patch since the turn of the new year, failing to win any of their games in January while a mini-revival in February has since faded away with one win in their last four league matches. That run has left Steve Clarke's men eighth in the standings with 44 points, four below seventh-placed Liverpool and four above Swansea City in ninth, with seven games remaining this term.
Arsenal are two points outside of the final UEFA Champions League qualifying position, currently occupied by Chelsea, but with the Blues only playing 24 hours later, the impetus will be on Arsene Wenger's men to shift the pressure to their London rivals. The Gunners are also one of the in-form teams in the league at the moment, having won five of their last six outings to keep their European aspirations right on track.