Verrips, a summer signing from KV Mechelen, was helped off the pitch towards the end of the first-half following a collision with his team mate Kean Bryan.
With Simon Moore still nursing a groin problem, manager Chris Wilder admitted “it could cause an issue” if Verrips is ruled to be concussed. Guidelines adopted by England’s three governing bodies dictate players must rest for at least six days if such a diagnosis is made, which could potentially leave United without cover for Dean Henderson when David Moyes’ side visit Bramall Lane.
“We’ll have to see how Michael is,” Wilder said. “We’ll take a look at him and then go from there but yes, it could cause an issue.
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“I thought he was really brave, going for that ball. Before that, he did everything we could have asked of him and so it goes without saying what happened was a real shame.”
Henderson was introduced just before the interval when Verrips, who together with Jack Rodwell was making his United debut, proved unable to continue.
Moore, a veteran of the club’s 2017 League One title winning squad, has been absent since damaging a muscle during training on the eve of last month’s trip to Brighton and Hove Albion.
“Simon is coming along well,” Wilder said. “He’s been making progress so there’s a good chance he’ll be okay for that one (West Ham).
“Obviously we’ll be working with him, as we have been, this week. He’s been doing well in terms of his rehabilitation so there’s a good chance he could be back.”
Despite focusing on the Premier League - United, who were promoted from the Championship last term, will enter their game with West Ham in eighth - Wilder was delighted to see his team progress to the fourth round stage of the competition.
Callum Robinson opened the scoring before Leon Clarke stretched United’s lead. Jordan Williams have AFC Fylde hope during the closing stages but they were unable to force an equaliser.
“It’s a feeling of relief,” Wilder, who made eleven changes, said. “It was quite an uncomfortable afternoon. The attitude of the team was good.”
“It’s difficult from a team perspective, to play at the same level as the team that’s been doing so well in the Premier League,” he added.