Sunderland under-23s have been putting in the yards at the Academy of Light ahead of Friday's Premier League International Cup match against PSV Eindhoven.
Scroll through a selection of snaps in the gallery below.
Sunderland under-23s have been putting in the yards at the Academy of Light ahead of Friday's Premier League International Cup match against PSV Eindhoven.
Scroll through a selection of snaps in the gallery below.