article_snippet: West Ham forward Diafra Sakho (centre) tries to evade Arsenal defenders Laurent Koscielny and Per Mertesacker (left) Arsenal playmaker Mesut Ozil (left) uses West Ham forward Diafra Sakho (centre) silky skills to bring the ball down in front of Stewart Downing (centre) and Mark Noble .
article_snippet: Arsenal's leading scorer Alexis Sanchez (centre) uses Arsenal's leading scorer Alexis Sanchez (centre) trickery to escape the attentions of Joey O'Brien .
article_snippet: Gunners defender Calum Chambers closes down West Ham winger Matt Jarvis as Arsenal take control .
article_snippet: Frenchman Giroud gets Frenchman Giroud shot away despite being surrounded by four West Ham players .
article_snippet: The Gunners centre forward watches as the ball sails towards the left corner of West Ham goal .
article_snippet: Former Manchester United forward Danny Welbeck (right) was brought on in the second half to replace Sanchez .
article_snippet: Wenger watches impatiently from the touchline with Former Manchester United forward Danny Welbeck (right) side only leading by one goal .