Manchester United manager Sir Alex Ferguson believes Newcastle could cause an upset against Chelsea on Monday.
United moved within touching distance of the title after a comfortable 4-1 win over West Ham at Old Trafford.
Chelsea need at least a point against Newcastle to retain any hopes of pipping Sir Alex Ferguson's side to the Premier League title.
"The way Chelsea have been talking is that it'll be easy up there - but we know that's not the case," he said.
United are three points ahead of Chelsea with a superior goal difference but have played a game more.
They face Wigan away on the final day of the season.
Chelsea play Newcastle at St James' Park on Monday before playing Bolton at home on 11 May.
A win against Wigan next week, or any slip ups by Chelsea in their last two games, will secure a second successive title for Ferguson's side.
"We have not won anything yet but we hope we can win the league next week," added Ferguson.
"There was a bit of nervousness in our play at times but we killed the game in the second half to continue what has been a fantastic season so far."
Ferguson praised Cristiano Ronaldo, whose first-half double took him to 40 for the season and left him just one adrift of Alan Shearer's 31-goal Premier League record.
"How many players could score that many?" said the United boss. "He is improving all the time. Plus he has spent 90% of the season on the wing."
United had Nani red carded for a headbutt on Hammers defender Lucas Neill but rarely looked like dropping points in their last home game of the season.
"It's been a great day for us and we've got a big chance," added Ferguson.
"Our players have been absolutely fantastic this season.
"We were down to 10 men and I said to try to run the clock down, keep possession and be patient in the second half and I'm very pleased because there was a bit of tiredness."
Ferguson admitted the referee had no option but to send off Nani, adding: "There is no excuse. He showed a measure of immaturity and we will deal with it."
606: DEBATE
West Ham boss Alan Curbishley refused to speak after the game, but assistant Mervyn Day played down comments which seemed to suggest the Hammers boss wanted United to win the league in preference to Chelsea.
"He tried to qualify some of his comments," said Day. "He felt Manchester United would be unlucky if they did not win the league, given they have been so dominant.
"I don't think he said he wanted them to win.
"I know Alan thinks a lot of Sir Alex but that goes out the window when you cross the white line."
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