Arsenal let their second two-goal lead slip in as many games as West Ham staged a hearty comeback at the London Stadium on Sunday.
Gabriel Jesus gave the Gunners the perfect start as he rounded off an eye-catching team move within the opening few minutes. Captain Martin Odegaard doubled the lead shortly after by volleying home from close range after more slick play from Mikel Arteta 's men.
Momeuntum then swung though as Said Benrahma reduced the deficit from the penalty spot. Bukayo Saka had a golden opportunity to put his side back in charge from the spot after a Michail Antonio handball but blazed his effort wide.