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Everton's new £13.5m new striker Oumar Niasse could miss out on making his debut against Stoke City as the Blues scramble to get his Visa paperwork approved in time.

The Senegal striker signed on deadline day after the Blues struck a deal with Lokomotiv Moscow, but have so far been frustrated in their attempts to get his Visa finalised.

Roberto Martinez said the next 24 hours will be crucial in determining whether the 25-year-old will get the go ahead to make the squad for the trip to the Britannia stadium.

He said: "We're waiting just to get the paperwork done. I think this morning was important in terms of getting the final step of that paperwork and we're hopeful that he will be able to be available.

"If he's not this weekend then clearly it [his debut] will be next week against West Brom."

Martinez added that the striker is not yet fully match fit but won't take long to be ready.

"It is clear Oumar isn’t ready to play 90 minutes, but he trained yesterday and he was very good," he said. "I think he is going to adapt to the physicality of the Premier League very quickly."