Chelsea star Eden Hazard admits fatigue is starting hit the squad.
Chelsea play at Aston Villa boasting a seven-point lead over Liverpool and Arsenal, while Manchester City are a further two points behind.
Hazard said: "I think the team are tired but it's normal because we have played a lot of games. Now we need to concentrate on training to work on our recovery and stay focused. I hope at the end we'll see that we are on top.
"We have a good team of physios and doctors. We don't train hard every day because it's difficult to play a game and do training. We want to stay fresh and be 100 per cent.
"At the moment I can play every game, I'm not injured - I hope! I try to give my best because I know the team want me to score or make assists. We are in good form. It was very important to win at Manchester City [last month] and now we are at the top, we want to stay there."