Arsenal moved into the Premier League’s top four at West Ham United’s expense as goals by Gabriel Martinelli and Emile Smith Rowe earned a 2-0 win in a lively London derby on Wednesday.
Brazilian forward Martinelli struck just after halftime with a clinical finish and substitute Smith Rowe eventually gave a dominant Arsenal some welcome breathing space with a superb 87th-minute effort.
It could have been a more comfortable night for Arsenal had Alexandre Lacazette, captain for the night in place of the disciplined Pierre-Emerick Aubameyang, not had his harshly-awarded penalty saved midway through the second half.
West Ham, for whom Vladimir Coufal was red-carded after conceding the penalty, failed to produce the kind of form that has seen them stationed in the top four since October.
They huffed and puffed and threatened sporadically but home keeper Aaron Ramsdale’s only real save was from a Jarrod Bowen effort shortly after Martinelli’s opener.
Victory hoisted Arsenal up two places into fourth spot with 29 points from 17 games with West Ham on 28.
The pre-match build-up had been dominated by Arsenal’s decision to strip Aubameyang of the captaincy for another lapse of discipline.