The Argentine has already been ruled out of this weekend's game with Watford and could miss the Arsenal match the following Sunday.
ďItís bad enough that he wonít play on Saturday,Ē said Platt.
ďItís difficult to assess an injury like that for how long itís going to be. On Saturday, he will be out. Heíll be doubtful for Arsenal. Itís a hamstring. There are different degrees of hamstring, thatís why you need the 48 hours. Weíll just have to see.
ďThere will be swelling and bleeding so you need to give it time to settle down. Itís a blow but when you have so many games in a short space of time you run the risk of this.Ē