The Hammers West Ham host Chelsea at Upton Park later this evening and Big Sam has warned His players ahead of the clash not to get Diego Costa angry. It all seems each time Diego Costa gets angry He seems to respond hard by scoring to ease His pain of anger. Diego Costa the leading top scorer 17 goals in English Premier League always look tough on the pitch when players especially defenders try to get on His nerves. West Ham Boss Sam Allardyce has warned His players not to make Diego Costa get angry because it seems getting Him angry makes Him perform more better. Most People regard Him as a old fashion centre forward due to His motivation of the physical and niggling aspect of the game which He enjoys. But realistically that makes Him who is His and better on the field of play. So keeping Him quiet and limiting services rendered to Him will help in the outcome of the game Big Sam concluded.