Chelsea's David Luiz has admitted his side's season will be declared a failure unless they pull off a miraculous recovery and win the Premier League title. PA PhotosDavid Luiz says Chelsea players have given it their all this season. • Lythell: Out with a whimper Chelsea need Manchester City and Liverpool to slip up in their final games to give the Blues a chance of getting back into title contention, with Luiz suggesting a season without silverware is unacceptable for the west London club. Luiz was part of the Chelsea starting line-up that lost the Champions League semi-final against Atletico Madrid on Wednesday, with his summation of the campaign pieced together by Jose Mourinho in his first season back at Stamford Bridge leaving