Chelsea boss Carlo Ancelotti has singled out the player who could wreck his chances of a first Premier League title.

The Italian tactician lauded the recent performances of Manchesteter United's Wayne Rooney whom he feels is getting better and better with each passing game.

He said to the Daily Mail,"United are using Rooney very well in this moment. Every game he proves his quality. He's a fantastic, fantastic player.

"I am surprised because he never drops, he always improves his performance.

"It's a good thing not only for Manchester United, but also for the national team because to have Rooney in this ­condition is very important for England at the World Cup. Is he the best in the world at the moment? I think yes. At the moment he's the most ­decisive player in the world."

Ancelotti will seek to put Arsenal out of the title equation when the two teams meet at Stamford Bridge later tonight.