Sunderland midfielder Jack Colback admits he's disappointed to have missed Team GB selection.

GB face South Korea tonight in the Olympics quarterfinals.

"I'm a little bit disappointed I wasn't playing in it," Colback told The Journal.

"I probably felt I'd done enough last season to be considered but it's one of those things. There's a lot of players who were left out that are probably thinking the same but it's given me a chance to focus on

doing well for Sunderland and being around the squad."