Chelsea are beginning to feel the effects of a tough schedule with Gary Cahill admitting the team are fatigued.
As well as their Premier League, FA Cup, Capital One Cup and European commitments, Chelsea had to compete in the World Club Cup as well as the Super Cup following their Champions League triumph.
Sunday's match against Manchester City was the Blues 46th of the campaign but there will be no let up in their schedule as they bid for a top four finish as well as chasing Europa League and FA Cup glory.
Rafael Benitez's side looked tired as they were beaten 2-0 by City and, while he does not want to make excuses for the performance, Cahill admits the busy fixture list is beginning to hurt the side.
"Unfortunately it does take its toll," Cahill told Chelsea TV.
"I think if you look back at the start of the season with the spark and the zip we had - I think sometimes a little bit of fatigue plays its part.
"We haven't had a clear week for about 29 weeks and you're expecting to go into games feeling 100 per cent fresh, trying to push on further in all competitions.
"I think at this stage of the season, it's not an excuse, but fatigue has to play a part.
"They (Manchester City) had a clear week and we've had a ridiculous amount of games.
"I think it told. I thought they were a lot fresher and sharper.
"We talked about it afterwards and we have to keep getting on. There's nothing we can do about it."