Manchester United's draw against Blackburn over the weekend means the Blues have the chance to establish a four-point lead at the top of the table.

"Every game we need to do our best because every game will be difficult," said Ancelotti, whose side qualified for the FA Cup final by beating Aston Villa on Saturday while Bolton enjoyed a blank weekend.

"Bolton will not be an easy game because they didn't play on Saturday. They will come to Stamford Bridge fresh.

"They can do a game with high tempo, so we have to pay attention. Bolton is one of the most important games of our season.

"Now is not the moment to think 'If we win the double' or not. The most important thing is to stay focused game by game. Our minds are focused on the Bolton game. Nothing else.

"We don't want to think about what might happen in a month. We have to wait, stay calm and focused. And, tomorrow, we have to improve our position and send United four points away. That's the most important thing.

"Maybe, if we are able to do this tomorrow, it could be a very important step towards winning the title."

Arsenal will leapfrog United into second if they can beat Tottenham in the north London derby on Wednesday.

That would be a welcome fillip for a side who were so comprehensively beaten by Barcelona at the Nou Camp last week to end their Champions League ambitions and leave the Premier League as their only remaining chance for silverware.

Goalkeeper Manuel Almunia expects a more hostile atmosphere at White Hart Lane than the one they experienced in Spain, though.

"At Tottenham it is going to be tougher," he told Arsenal TV Online. "Barcelona's stadium is massive with a lot of people. But it is not the same pressure and the people are more gentle. They enjoy their team.

"The rivalry Arsenal have with Tottenham will switch the people on. The atmosphere is more serious and tough. But we have played there many times and we know that very well."

Tottenham boss Harry Redknapp sees the game as the perfect opportunity to bounce back from their FA Cup semi-final elimination by Portsmouth on Sunday.

"We couldn't have a better game now," Redknapp said. "If I had to choose a game, I'd choose Arsenal at home for the next one.

"Sunday was a bad day, but what can you do? Life is full of highs and lows. That was a big low, but we've had plenty of highs this season. The mark is how you pick yourselves up."

Pompey, who were relegated by results elsewhere over the weekend, travel to Wigan, themselves in trouble just four points above the drop zone.

The other beaten FA Cup semi-finalists, Villa, travel to Everton with their Champions League hopes hanging by a thread.

Fourth-placed Manchester City's 5-1 win over Birmingham on Sunday left them eight points ahead of Villa and anything but a win against a side just four points behind them would virtually end Martin O'Neill's men's chances.