Sir Alex Ferguson expects former Manchester United striker Louis Saha to pose a serious threat when Tottenham host the Red Devils on Sunday.
Spurs will enter the Premier League clash still reeling from last weekend's 5-2 derby defeat at the hands of fierce rivals Arsenal.
Louis Saha was on target with Tottenham's opener in that encounter before Arsenal staged a stunning comeback, marking his third goal in three league appearances for the club.
The France international, who arrived at White Hart Lane from Everton on the final day of the January transfer window, will be keen to continue his bright start at Spurs against his old employers this weekend.
United boss Ferguson knows the 33-year-old, who spent four years at Old Trafford before joining the Toffees in 2008, could prove to be a handful.
"I don't know the circumstances behind Louis Saha's transfer but Everton were happy to let him go," he told Inside United.
"And then he goes to Spurs and scores two goals [against Newcastle]. That's typical of Louis. He's got tremendous talent, he just doesn't play enough.
"He is a handful, no doubt about that. He's got two great feet, he's quick, he's got a good spring in the air. There's no doubt he is a handful."
Sunday's clash could prove definitive to Tottenham's title chances, with Harry Redknapp's men currently sitting third in the table; eight points behind second-placed United and 10 adrift of leaders Manchester City.
Ferguson knows his side will have to be on top form at White Hart Lane to contain the hosts and has hailed the quality within Redknapp's side.
He added: "They've got a fantastic squad, and a goal threat throughout the team.
"Gareth Bale contributes, Rafael van der Vaart, [Jermain] Defoe, [Emmanuel] Adebayor. They've got goals in their team."