Everton are sweating on the fitness of defender of Yerry Mina for the Blues' trip to Manchester City on Saturday.
The Colombian scored on his return to first-team action against Wolverhampton Wanderers on Boxing Day at Goodison Park, but had to be withdrawn in the 76th minute in a match the visitors went on to win 2-1 with a goal in injury time.
Frank Lampard will have Conor Coady available once more, with the on-loan centre-back ineligible to play against parent club Wolves on Monday, but his deputising teammate will require a late check for any sort of inclusion against the Premier League champions.
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Speaking about the availability of Mina in his pre-match press conference on Friday, Lampard said: "We're going to find out today. He's training today. He had some cramp in the game [against Wolves] and some sensation around his hamstring - very low level - so he'll train today and then we'll make a call.
Lampard also revealed that the Blues are contending with a bug in the camp, that the audibly hoarse Everton manager had not managed to avoid himself.
He said: "We've got a few people who are slightly unwell. You might be able to hear that I'm a little bit like that myself. So, we've just got to do a few checks on that."
Despite the wider squad issues, Everton have been boosted by the return of striker Dominic Calvert-Lewin to the match day squad against City, although Lampard would not be drawn on whether his main attacking focal-point would start against Pep Guardiola's side.
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