Everton manager Sean Dyche says Vitalii Mykolenko faces a late fitness check following Wednesday night's Carabao Cup victory, as focus switches back to the Premier League with the visit of Luton Town on Saturday (3pm BST).
The Blues host Rob Edwards' newly-promoted side looking to build momentum following a pair of excellent victories on the road over Brentford and Aston Villa respectively.
Left-back Mykolenko was withdrawn at half-time of the 3-1 midweek win at Villa Park, with Dyche revealing in his pre-match press conference for the Luton Town clash that the Ukrainian will be assessed on Friday after sustaining an issue "we've got to be careful with".
Jack Harrison made an impressive debut against Villa, managing 65 minutes on his return to action from a hip injury before eventually being replaced by Dwight McNeil.
Dyche says he has been impressed with the on-loan winger's desire to regain peak condition as quickly as possible.
He said: "I thought Jack was excellent [against Aston Villa], not necessarily because of his technical and tactical performance in the sense of being as sharp as he will get, but for someone who has hardly had any football - he has had training, I must be clear - but actual football as in playing games at this level has been minimal for a long period and I thought he was really sharp and did really well.
"I think it's a fine line [on his upcoming availability]. I spoke to him about playing. There was an Under-21s game on Tuesday night and we wondered whether to get him 90 minutes in that, but he was so clear-minded - he's been clear-minded in training, he has had a good training period and it was only the games schedule we couldn't quite guarantee for him.
"But I spoke to him and he was absolutely clear - and when players are like that, it's often the best way of being when they think they can play.
"I thought he delivered very, very well, particularly tactically.
"He has a good understanding of his role tactically and we know he can play. The fitness and sharpness will come but he seems clear and his body certainly does, so I'm pleased for him."
Dominic Calvert-Lewin has scored in the Toffees' past two games - his coolly-taken goal against Villa was his 11th in 11 League Cup appearances for Everton - having overcome a facial injury sustained in the league game at Villa in late August.
On the number nine's fitness, Dyche added: "I am pleased for him. He has dug in for a long time and we've tried to come away from the pressure of just putting him straight back in all the time [after an injury] and, hopefully, that will pay dividends in the longer term for him and for us.
"I think he's looked sharp in the games. We knew we were building him back into first-team football, hence why we got him off at a reasonable stage of the game [against Aston Villa], but, yes, he will only get fitter and sharper."
André Gomes (calf), Seamus Coleman (knee) and Dele (groin) all remain sidelined.