Marca reported the 25-year-old's injury is deemed negligible, even so, it could rule him out of Los Merengues' remaining warm-ups.

Robben, dubbed 'The Glass Man' by the Spanish press, suffered nine different injuries last season and now has severe fitness problems as a result.

Real are re-building their squad this summer, and they are set to offload a good number of their old guard in the process, including injury-prone wide man Robben.

The former Chelsea man was linked with Manchester City earlier in the close season, but recent reports suggested he could be involved in a part-exchange deal for Liverpool's Xabi Alonso.