Chelsea senior players fear they're not FIT ENOUGH to survive the second-half of the season.
In their last three games they have lost a goal in the final three minutes against Manchester United, Southend and Fulham.
And a source close to the dressing room told The Sun: "Some of the players are wondering if their fitness levels are at the necessary level. These players never used to concede goals late in games and a lot of that was down to making sure everyone was super-fit."