Everton face an anxious wait to see how long they will be without Lacina Traore, amid fears that the striker could be sidelined for a month.

The 23-year-old, who is on loan from Monaco until the end of the season, pulled up in the warm-up before Saturday’s game against Chelsea with a hamstring problem.

He will undergo a scan on Friday which will determine whether he needs surgery on his leg, and will offer a clear indication of just how long the 6ft 8in forward will now miss out.

However, Martinez believes it will be a matter of weeks rather than months”.

“It is going to take a long period of time, which at this stage of the season will be a big miss,” said the Blues boss.

“It’s a really disappointing outcome. He was ready and had been working really hard since he arrived at the club. Starting the game at Chelsea was the next target after Swansea and for him to pull his hamstring in the last action of the warm-up was a really disappointing moment.