Arsenal boss Mikel Arteta has refused to rule Martin Odegaard out for Sunday's North London derby, while Micky van de Ven is expected to return for Tottenham.
Arteta's comments come as a surprise after Odegaard suffered an ankle injury for Norway during the international break, which the team doctor said would likely take three weeks to heal.
Arteta, who is already without Declan Rice (suspension) and Mikel Merino (injury), insists Odegaard could still be available for the trip Spurs.
He said: "We need some more tests. Let's see what happens in the next day or so. [It will be Friday] afternoon probably. Let's see the extent of the injury and how quickly we can get him back. Martin wants to be here every day but we have to wait and see.
"I leave that to the doctor. He's willing and he wants to be present in every game. We need to make sure we know first how good he is or not.
"Players with 48 hours are always available. Let's see what happens."
Gabriel Jesus has missed Arsenal's last two games with a groin injury, but is expected to return if he comes through the training sessions before Sunday's game.
New-signing Riccardo Calafiori, meanwhile, will be assessed over the weekend before a decision is taken on his availability.
Spurs are set to have Van de Ven and Dominic Solanke fit for Sunday's visit of Arsenal after they missed the defeat at Newcastle before the international break.
A late call will be made on Yves Bissouma after he sustained an issue while away with Mali on international duty.
"Micky's good, he's trained all the way through the international break and it was good for him to stay with us to build him back up so he's ready to go," Spurs boss Ange Postecoglou told the official club website.
"Dom's improved as well and trained the back half of this week. We still have two days to go with those guys so hopefully they get through training OK and are available."
On Bissouma, Postecoglou said: "He's got a bit of an issue, but we'll have a look at him over the next couple of days and see how it settles."
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