Premier League clubs face a battle convincing Hoffenheim to sell Swansea City's on-loan winger Gylfi Sigurdsson.

Liverpool boss Kenny ­Dalglish, Everton coach Jimmy Lumsden and United spy Martin Ferguson all watched Sigurdsson dazzle against Bolton on Saturday.

The loan deal has been controversial­ with the German side's supporters.

They still sing Sigurdsson's name every week and only a major fee for the 22-year-old will take the heat out of the ­decision.

That means the Premier League big hitters will have to get out their cheque books to make a move happen.