Sir Alex Ferguson has urged his side to maintain their high-level of performance after Manchester United fired themselves back into the title race throughout December.

The Red Devils have been in scintillating form, scoring 17 goals and conceding just one on their way to five straight victories, and will be looking to make it a perfect close to 2011 with a win over Blackburn at Old Trafford tomorrow.

Ferguson knows there are plenty of twists to come in the battle for the Barclays Premier League crown however, and isn't writing any of the big rivals out of the race just yet.

"We have plenty of options in attack and I'm pleased with the form. Hopefully we can keep the momentum going. The form is good and the players are enjoying themselves too," said the Scot during his pre-match press conference.

"It's only the end of December though. We surrendered a 12-point lead to Arsenal some years ago and won the title despite being 12 points behind Newcastle.

"Last year, in November, Chelsea were so many points clear that they were odds-on. But they hit a bump and we took over. So I think, with some of the games coming up in the second half of the season, you can't say for certain that's going to be the case [Arsenal and Chelsea are too far behind already]."

The United chief was also quick to sing the praises of Tottenham Hotspur, who have moved clear of their London rivals in third and have set their sights on the top two.

Ferguson believes Harry Redknapp's side are playing the best football in the division at the current time, and can therefore not be counted out of a potential title fight.

"The difficulty for Arsenal and Chelsea is they've got to overtake three teams so, unless the three teams collapse, only that will be an opportunity to take advantage," concluded the 69-year-old, who celebrates his birthday tomorrow (Saturday).

"As for Spurs, I think they play the best football in the country. The current team, in the form they're in at the moment, is the best in the country."

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