Bayern Munich centre-forward Robert Lewandowski is seeking a new challenge, his agent has revealed, with both Manchester United and Chelsea among the favourites for his signature.

“Robert’s motives are not money or a particular club, because almost all the top clubs would like to have the best striker in the world in their ranks,” the Pole’s representative Pini Zahavi told German publication Sport Bild.

Lewandowski is an uncertain 6/5 still to be a Bayern player at the close of the summer transfer window, with Real Madrid the shortest of his potential suitors in the betting at 7/4.

Next come Paris Saint-Germain at 6/1, Manchester United at 7/1, and Chelsea at 10/1.