Demba Ba tracked by Manchester United

Ba release clause has Ferguson on alert as Manchester United weigh up move for Toon star

Manchester United have expressed interest in Newcastle striker Demba Ba, but have yet to make an offer.

Sportsmail revealed the 26-year-old Senegalese has a release clause making him available for a knockdown fee in the summer, which has already drawn attention from Paris St-Germain, Liverpool and Tottenham.

Armand Doorn, one of Ba's management team, said: 'A lot of clubs are calling for Demba. We are doing transfer negotiations with his brother.

Ripped apart: Demba Ba was brilliant against Manchester United at the start of January and scored Newcastle's opening goal (below) in their 3-0 win

Ripped apart: Demba Ba was brilliant against Manchester United at the start of January and scored Newcastle's opening goal (below) in their 3-0 win

What a finish: Demba Ba scores against Manchester United

'Before we did it alone, and now we do it with his brother. Obviously he is doing very well at Newcastle, and a lot of clubs are showing interest but there is nothing concrete. It is true Manchester United, but nothing concrete.

'No manager has called me and said, “Armand, can we sit down,” and everybody is asking how much his release clause is, but nothing concrete.'

Doorn confirmed the buy-out clause but said activating it was complicated. 'There is a clause but it is not simple. PSG did show interest, maybe more concrete too but this is because I know a lot of people know Demba already, since he was young.

'So it is easier for them to talk to the brother, to the family and there is a possibility but nothing concrete.'

Tough task: Toon manager Alan Pardew is determined to keep hold of Ba

Tough task: Toon manager Alan Pardew is determined to keep hold of Ba