Arsenal hold on to beat Chelsea 1-0 thanks to Smith Rowe’s first-half goal.
Jorginho’s poor backpass had Kepa scrambling back to push it off the line, but Aubameyang was there to slot the rebound to Smith Rowe to set up a tap-in.
In the second half, Pulisic had a header ruled out by VAR for offside.
Zouma saw a late effort tipped onto the bar by Leno before Giroud fired a close-range shot against the woodwork on the follow-up, but Chelsea just couldn’t find a way through.
Gunners victory sees Chelsea stay in fourth place, six points clear of West Ham below them.
Tuchel will be hoping they can quickly put this behind them though as their attention turns to the FA Cup final against Leicester on Saturday.
Meanwhile, Arsenal leapfrog Everton into eighth and they have a week to wait until their next game against Crystal Palace.