Chelsea - Diego Costa Back to his best at the Emirates on Sunday, Costa has been crucial for Chelsea all season, even if his performances have left something to be desired. They have won 38.9 per cent of their games when Costa starts and failed to win any of the five he has sat out. There has been talk that he wants out of Stamford Bridge but Chelsea would have to make sure they can find an adequate replacement given how much he adds to the team. Difference in win rate: 38.9% Picture: REUTERS

Credit : REUTERS