Everton boss Ronald Koeman has revealed that club's record-signing Gylfi Sigurdsson is a doubt for Monday-night trip to Man City.

The Icelandic midfielder joined the Toffees from Swansea for an initial transfer fee of £40 million on Wednesday

"We will do some tests to see about Gylfi's physical state. He needs game time, but if it's game time he needs - it will be with the first team," said Koeman.

"I don't know if he'll be involved on Monday, but we will make that decision on Sunday."