Everton defender Bryan Oviedo has undergone a successful operation on the double fracture to his left leg.
The Costa Rica international broke his tibia and fibula during Saturday's FA Cup fourth-round victory at Stevenage.
"Bryan's surgery was a big success and he is in a comfortable and stable condition," the club's head of medical services Danny Donachie told evertonfc.com.
"He fractured his tibia and his fibula and they were displaced, so we weren't able to put them back into place until Monday.
"He had surgery (on Monday) night when a rod was put through his tibia, which means he will come back stronger than before.
"It was a clean break and that means that there are no pieces of bone.
"Sometimes when there are small fragments of bone in the area, it can be difficult to deal with.
"But these are clean breaks, so they will put the bones back into position and it will heal well from there.
"We will be working hard to get him back as quickly as we can."