Thomas Tuchel has said he was wrong to bring Romelu Lukaku on during Chelsea's 3-2. defeat to West Ham on Saturday afternoon.
Tuchel started Lukaku on the bench but introduced the £97.5million striker into the game during the second half as Kai Havertz was forced off injured.
Lukaku was just three appearances into his return from the ankle injury he suffered in October and Tuchel admitted the striker was not 'physically' ready to play 45 minutes of football.
Speaking to Chelsea's official website, Tuchel said: ‘It’s my fault.