Nastasic has suffered a slight knee injury, manager Manuel Pellegrini said Tuesday.

With the news, Nastasic will likely be held out of Wednesday's match against Sunderland, although he wasn't likely to start anyway.

Nastasic will miss the next three weeks after picking up a calf injury in last weekend's match against Tottenham, Sky Sports reports.

Nastasic didn't play in the midweek Champions League win over Viktoria Plzen and now we know why. The three week timetable was an estimate, so it's certainly possible that he could return before that.

Nastasic headed in Samir Nasri's corner at the 25 minute mark of City's 7-0 demolition of Norwich City on Saturday.

The goal was Nastasic's first this year on only his fourth shot of the season. With Joe Hart on the bench in favor of Costel Pantilimon, Nastasic was still able to pick up his third clean sheet.

Nastasic has played three matches since returning from an early season ankle injury, one Premier League match for Manchester City and two World Cup qualifiers for Serbia.

Nastasic played all 90 minutes for City back on August 31 against Hull and recorded a clean sheet. He'll be asked to shoulder a bigger defensive burden moving forward until Vincent Kompany can return from his thigh injury.

Nastasic (ankle) is expected to play in Saturday's Premier League match against Hull City, the Daily Mail reports.

Nastasic originally injured his ankle at the end of July and was given a four-to-six week timetable for a return, which fits in with his debut Saturday. City really struggled last week without him and they'll be heavily relying on him Saturday with Vincent Kompany (groin) unable to play until mid-September.

Nastasic (ankle) was available but stayed on the bench for Sunday's 3-2 loss to Cardiff City.

Nastasic was set to take a prematch fitness test, which apparently did not go well enough for him to start the match. His next opportunity will come Saturday against Hull City.

Nastasic has returned to light training and will be given an opportunity to take a prematch fitness test before Sunday's match against Cardiff City, the Daily Star reports.

If Nastasic passes the fitness test, he is expected to start in place of the injured Vincent Kompany (thigh). It would be a very quick turnaround for Nastasic, who was injured on July 27 and was expected to take between four and six weeks to recover. He likely wouldn't be rushed back if Kompany were healthy, but if the club feels he can contribute, they'll throw him out there.