Germany worldwide Ozil - making his 150th Arsenal appearance - has come under fire for lacklustre displays this season and the ire aimed in his direction increased during a run the Gunners took into Wednesday's game that had seen them win just three times in their last 10 matches in all competitions.
The east Londoners held them at the break but Mesut Ozil broke the deadlock early in the second half and Theo Walcott extended their advantage on 68 minutes before Olivier Giroud sealed the derby spoils late on. We have to start winning games. Sign up for a Day or Week Pass now and get a 10% discount.
Meanwhile, Arsenal manager, Arsene Wenger, said: "Even though the result wasn't what we wanted against (Manchester) City, it had a positive impact on the moral of the team".
Meanwhile, local rivals Tottenham Hotspur are in third place on 89 goals.
Arsenal's English striker Danny Welbeck (2nd L) has an unsuccessful shot during the English Premier League football match between Arsenal and West Ham United at the Emirates Stadium in London on April 5, 2017.
"Players that come in don't improve the first 11, and that is not good enough at Premier League level".
Theo Walcott says there's nothing that will keep Mesut Ozil down following the Arsenal playmaker returned to form using a knock against West Ham.
After five successive losses in the Premier League and with only a five-point cushion above the relegation zone, West Ham manager Slaven Bilic is under no illusions. Now is the time we need to show leadership, starting with me. "They deserved to win the game".
"Ozil and Sanchez are important players but everyone did well".
There have been times this season when the German worldwide hasn't produced enough on the pitch but there have been more occasions on which Arsenal have played to his strengths.
Job done, Arsenal made a flurry of substitutions and, with just eight minutes remaining, two of the fresh faces combined as Alex Oxlade Chamberlain tore into the heart of the Hammers penalty box before laying off to Giroud who curled a precision 15-yarder around Randolph and into the far corner to round off a miserable night for anxious West Ham.
Bilic admitted his players were lacking some confidence, adding: "After five defeats, of course you can't talk about great confidence".
The hosts did eventually begin to find some joy down the right flank, with West Ham left back Arthur Masuaku struggling to cope with the pace and trickery of Hector Bellerin and Walcott.