Chelsea midfielder Joe Cole is fully focusing on winning the Premier League with the Blues rather than the World Cup with England.[LNB] Carlo Ancelotti's side moved four points clear of Manchester United at the top of the Premier League with a 1-0 win over Bolton on Tuesday.[LNB]The victory came just three days after the Blues set up an FA Cup final against Portsmouth by beating Aston Villa 3-0 at Wembley.[LNB]Cole, whose contract is up for renewal in the summer, has struggled to establish himself as a first-term regular under Ancelotti, but an impressive end to the season with the Blues could yet see him force his way into Fabio Capello's World Cup squad.[LNB]The 28-year-old, though, insists he is concentrating on his club for the time being.[LNB]"My focus at the moment is just playing well for Chelsea. I don't like to talk about England because you can't talk yourself into an England squad," said Cole.[LNB]"I just want to work hard for my team-mates and whatever happens happens. It's obviously something I'd like to play in but at the moment I'm just concentrating on helping Chelsea win the title.[LNB]"I just want to keep playing well. I give everything in every game I play and that's just my nature. I want to work hard for my team-mates and manager and what will be will be."[LNB]Cole has been impressed by Ancelotti in his first campaign at Stamford Bridge.[LNB]"Ancelotti is a cracking manager," said Cole.[LNB]"He's shown in the last few weeks what he's all about with his team selections.[LNB]"The boys really get on with him. He has brought in a great camaraderie and we have a team spirit developing again.[LNB]"Because of that, wining the double would be a massive achievement for Chelsea, for everyone at the club."[LNB]Midfielder Michael Ballack is also out of contract in the summer, but the German instists he is not concerned about his future.[LNB]"I am very relaxed about the situation," he told German newspaper Bild. "It also affects other players.[LNB]"I want to play at the very highest level of football for the next two years."