Thomas Tuchel has reportedly irritated Chelsea's squad by hauling players into training on what was supposed to be their day off.
The Blues manager is doing everything he can to arrest the club's recent slump, with the FA Cup final against Liverpool to come this weekend.
Chelsea threw away a two-goal lead and conceded a 97th-minute equaliser in their 2-2 draw with Wolves on Saturday, which left them with just one win in their last five matches.
According to The Sun, players were unhappy at being called in on Sunday as they are exhausted following a season which has seen them play 59 games in all competitions so far.