Sunderland midfielder Colback admits Team GB frustration
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."