This article in The Times is raising some questions about whether Tevez will be able to play on Saturday and maybe the last game as well.

".... Joorabchian has denied that he has given permission for the contract to be annulled because he would then have no guarantee that Tévez would return to his control at the end of the season.

The Iranian-born businessman says he is willing to make necessary amendments to the contract that would satisfy the Premier League, but he has been unable to meet West Ham officials this week. Unless an agreement is reached, he is unlikely to allow Tévez to play against Bolton on Saturday and Manchester United eight days later. The Premier League has said that is a matter between the club and Joorabchian."

although other parts of the article are more optimistic :-

“He has great affection for the people at West Ham and has absolutely no gripe with the club, the directors or the chairman. He wants them to do well and he is, of course, very close to Carlos and wants the best for him. He has made himself available to West Ham this week [for talks] and hopes they can come to an amicable settlement before the game on Saturday.”

Also of interest is this statement about Tevez next season :-

“New arrangements are in place with the Premier League and dialogue is taking place in terms of Carlos Tévez’s future beyond the end of the season,” a West Ham spokesman said. “He is a registered player with West Ham and nothing has changed since he played against Wigan on Saturday.”