Team news
Arsenal will be with out Danny welbeck who has a knee injury,meanwhile ox chamberlain,mikel arteta and mathieu debuchy are back from injuries.
Aly cissokho,kieran richardson and Jores okore all trained and is boost for villa but ciaran clark and libor kozak are still out.
Head 2 head in fa cup
Arsenal 7 wins-3 draws -villa 3 wins

Villa have kept 2 cleansheets in their last 21 fa cup matches
Villa have played in final 10times winning 7 and last won in 1957
It will be Arsenals 19th fa cup final and a record for any club & have won 11.
Giroud has scored 7 & assisted 4 in his 13 apps & has scored in each of his last 3 games against villa
Each of the last 3 times Arsenal have faced 2nd tier opposition in semis have gone on to win the trophy
Last fa cup meeting was in 2011 and saw villa lead 2-0 at half time but Arsenal overturned the deficit in 7 mins to record a 3-2 victory
Arsenal have won 22 and lost 3 of the last 34 meetings with villa and all 3 defeats were at the emirates.