Manchester United have made an inquiry over the availability of Bayern Munich's Robert Lewandowski after the striker began doubting his future with the German champions.
The Poland international has been of interest to United for a number of transfer windows, with Ole Gunnar Solskjaer looking to rebuild his squad after a bitterly disappointing season in which they finished sixth in the top-flight.
German publication Kicker, as relayed by the Daily Mail, claim Lewandowksi is unsure whether to put pen to paper on a new deal in Bavaria, prompting United to step up their interest for the Bundesliga star.