Jose Mourinho has reportedly banned his players from engaging in any sort of fun and banter at Chelsea training.
The Blues have failed miserably in the early stages if the 2015/16 Premier League season, winning just once in their opening five fixtures.
In a bid to save the reigning champions' season, Mourinho has moved to make any jokes or light-hearted fun taboo at Cobham, as he looks to get the campaign back on track after the West London club's worst start to the league in almost three decades.
Chelsea meet Israeli champions Maccabi Tel Aviv in their Champions League opener on Wednesday night and Mourinho will be looking for a much-improved performance at Stamford Bridge following Saturday's 3-1 loss to Everton which saw them drop to 17th place on the league table.