Manchester City defender Pablo Zabaleta confirmed he is out of contention for his side's UEFA Champions League semi-final second leg against Real Madrid with a calf injury.

The Argentina international was already under an injury cloud but confirmed the extent of the damage via Twitter on Tuesday, meaning he could be out for the rest of the season.

"Sadly after an MRI scan, I can confirm a muscle tear grade two in my left calf which is around three weeks off," Zabaleta tweeted from his official account.