West Ham boss Manuel Pellegrini is delighted with the form of Sebastien Haller.
Haller is preparing to face Manchester United.
Pellegrini said, "I said last week, on Sebastien, that he is the complete player because, when you don't have the ball, most strikers don't work too hard in recovery. I think Sebastien is always helping though.
"He's always fighting with the centre-backs and he is always coming back to play with the midfielders.
"I think he will continue improving and continue being a successful player for us."
