"Good afternoon, I would like to tell you about my injury and quell rumours. I return to play in 15 days or less," he said on Twitter on Thursday.
The 30 million-pound ($48.9 million) purchase from Ukrainian side Shakhtar Donetsk has been ever-present in Manchester City's midfield this season, and his absence forced coach Manuel Pellegrini to play defender Martin Demichelis in the 1-0 home defeat by Chelsea on Monday.
He will miss Saturday's trip to Norwich City, the midweek match against Sunderland and the FA Cup fifth-round clash with Chelsea next Saturday.
He is also a doubt for the first leg of City's Champions League round of 16 match with Barcelona on February 18.
(Reporting By Sam Holden; editing by Josh Reich)