Chelsea star warns teammates they must improve after Newcastle defeat

This weekend saw Chelsea lose the unbeaten record that they had so vigorously defended this season, and goalkeeper Thibaut Courtois has admitted that they have to improve if they are to be crowned champions come the end of the campaign. A Papis Cisse double was enough to hand Jose Mourinho’s side their first loss in 23 games, and also allowed Manchester City to close the gap to three points at the summit of the Premier League.