Schalke are weighing up an audacious summer move for Didier Drogba.
The Bundesliga club are mindful of the fact that Raul has yet to sign a new deal at the club and could leave at the end of the season.
Drogba, 33, is also out of contract and seems reluctant to sign a new one at Stamford Bridge.
Having spent eight years at Stamford Bridge, it is understood the Ivorian is open to the prospect of a challenge elsewhere
Numerous clubs expressed their interest in Drogba back in the January transfer window, with offers from clubs in America as well as big-spending Anzhi reportedly on the table.
Schalke have entered the running now as well, as the Bundesliga club look at options in the market in the event Raul chooses to leave them in the summer.