Blackburn Rovers manager Sam Allardyce does not agree with Arsenal boss Arsene Wenger's "untouchable" assessment of Manchester United.
However, he does feel this could be the best team ever produced by Sir Alex Ferguson during his long reign at Old Trafford.
United have kept 14 successive clean sheets in the Premier League and lead Liverpool by five points at the top of the table.
Allardyce takes his side to face United on Saturday as rank outsiders but does not believe the title race is a foregone conclusion.
"They are formidable but not untouchable and somewhere along the line they will drop a point or concede a goal and lose a match," he said.
"But this is the best form of the season. Many games throughout the early part of the season were a struggle for them but they came through those and that is why they are the best team.
"When they don't deserve to win they still win and when they are in the mood they can take you apart."
As well as leading the Premier League, United are in the Carling Cup final and are still in the Champions League and FA Cup.
Allardyce believes more trophies this season will see the current crop of players crowned Ferguson's best-ever.
"Another double or better will say to everyone in the world that this is the best team Sir Alex has had," said the Rovers boss.
"Their consistency and capabilities to win trophies at the highest level will prove that is the case."