James McCarthy is a doubt for the Republic of Ireland's World Cup Qualifier against Serbia.
The midfielder was left out of the Everton squad for their Premier League clash against Stoke earlier due to a groin problem.
After the game, manager Ronald Koeman said that they they'll decide tomorrow whether he needs an operation.
They Boys In Green play Oman in a friendly next Wednesday before they open their qualifying campaign in Belgrade on Monday September 5th.
McCarthy has also been linked with a move away from Everton with Celtic reportedly interested in a loan deal before the close of the transfer window.