Manchester United midfielder Casemiro will leave the Premier League side at the end of the season upon the expiry of his contract, the club said on Thursday, Reuters reported. 

The 33-year-old does have a one-year extension option, but the club has chosen not to activate it according to a team source.

United's decision not to extend or renew his contract was made far in advance of Thursday's announcement as part of long-term squad overhaul plans. Casemiro had requested the club confirm his summer departure at this time, according to Reuters.