The Hammers have lost all three Premier League games this season, but the former Manchester City boss saw signs of improvement against the Gunners
Manuel Pellegrini liked much of what he saw from his West Ham team, despite a third defeat in as many Premier League matches at Arsenal.
Marko Arnautovic gave the Hammers a 25th-minute lead at Emirates Stadium, but the Austria forward's injury after an hour proved a pivotal moment as Pellegrini's men subsided to a 3-1 defeat.
Danny Welbeck's stoppage-time clincher means West Ham have now conceded nine times in their three outings under Pellegrini, but the ex-Manchester City manager did not believe the scoreline gave a fair reflection of the action in north London.