United States international Weston McKennie is open to leaving Bundesliga side Schalke 04, sources told ESPN.

McKennie, 21, was one of the few Schalke players to not see his stock drop following a run of 16 Bundesliga games without a win this season.

No longer 100% happy at Schalke, the versatile McKennie -- who is one of the club's biggest assets -- would be in favour of leaving if the Royal Blues wish to sell him and his new club proves a good fit, sources say.

A report by German outlet Sport1 has already linked McKennie, who could command a fee between €20-€25 million, with Hertha Berlin and fellow Bundesliga side VfL Wolfsburg also a possible option.