Goals from Mesut Ozil, Theo Walcott and Olivier Giroud gave Arsenal a much-needed 3-0 win over West Ham on Wednesday night in the Premier League.Ozil gave Arsenal the lead on 58 minutes with a left-footed shot from the edge of The area, though Darren Randolph should have done better in the West Ham goal. It was 2-0 just 10 minutes later through Walcott, which struck home from 10 yards after Ozil's center from a fine Arsenal move. 1-0 up, but both Hector Bellerin and Elneny saw their efforts from close range desperately blocked.Arsenal upped the tempo in the second half, and got their opener through Ozil's tame effort from the edge of the box, which Randolph parried into the net .Randloph kept West Ham in the game for a few minutes at least with a good low save from Danny Welbeck's poked effort in the area, but he could not keep Walcott on 68 minutes.Alexis Sanchez's backheel found Ozil down the left channel , And his center was first time b Y Walcott, who has a ball in the back of the ball, is a great way to get the ball rolling. Alex Oxlade-Chamberlain.Arsenal was denied a penalty in stoppage time after Sam Byram hacked down Nacho Monreal, but it mattered not as Arsene Wenger's back into the hunt for the top four The third came seven minutes from time through Giroud, who curled a fine effort into the corner from 15 yards just nine minutes after coming on