Erik ten Hag is waiting for a full diagnosis on Christian Eriksen's ankle injury after the midfielder was pictured leaving Old Trafford on crutches.
The Denmark international was on the receiving end of a strong challenge from Reading striker Andy Carroll during Manchester United's 3-1 FA Cup fourth-round victory.
Carroll avoided punishment from referee Darren England for the tackle, though he was later sent off for two bookable offences.
Eriksen's injury is a cause of concern for United, with crucial Premier League clashes and a Europa League showdown with Barcelona on the horizon, and Ten Hag is waiting for a full assessment on the problem.
"It's always difficult to say so soon after the game finished, but it's an ankle [injury] and we have to see what the diagnosis is," he told a post-match press conference.
"It will be a minimum of 24 hours before we know that, and then I can say more."
Victory for United keeps the club in contention across all competitions this season and the performance of Antony caught the eye, having provided the assist for Casemiro's opener.
Ten Hag had called for more from the pre-season signing following the midweek EFL Cup win against Nottingham Forest and, while he has seen progress, feels there is still more to come.
"I have some experience with him. We have to challenge him and if you challenge him he can adapt, adjust his game, that is what we have to do, definitely," he added.
"He has to be more variable, more dynamic, but also he needs his team-mates and his team-mates around him. But also [needs to know] how to use your team-mates.
"He has to work on that, but he is investing in that at the moment, and you see the progress. But still I think there is a lot of room for improvement."
Balogun would be 'great addition' for USMNT, 'but his heart needs to be in it'
Folarin Balogun would be a "great addition" to the United States team, but Arsenal's Matt Turner only wants the striker to make the switch if it "comes from the heart".
Arsenal forward Balogun has excelled on loan with Reims this season, scoring 17 goals in 27 Ligue 1 appearances – behind only Jonathan David and Kylian Mbappe (both 19).
The 21-year-old's excellent form has prompted talk of a tussle for his international allegiance, with the New York-born star eligible to represent England, the United States and Nigeria.
Balogun has been a mainstay in the England Under-21 set-up, but he withdrew from the squad for this month's internationals due to injury.
That development has led to fresh hope Balogun will pledge himself to the USMNT, and Turner confirmed he had spoken to his Gunners team-mate on the matter.
"I spoke to Flo. We obviously had most of our preseason together, and I knew going into it he had some roots in the USA," the goalkeeper said on Wednesday.
"So, he and I developed a relationship pretty quickly. That's pretty much the extent of it. We check in on each other here and there.
"He'd be a great addition to our national team. I think he's done really well, obviously, for his club on loan, and we'll see.
"The decision has to come from the heart, because it's not necessarily an easy task to come and play in these CONCACAF games. It's a tough region at times.
"So, for us, we'd be really grateful to have him, but his heart needs to be in it."
Earlier in the week, Balogun told Sky Sports he was yet to decide on his future but has aspirations of playing at the highest level.
"My international future is not decided yet in terms of who I'll play for," he said. "But of course I want to play international football at the highest level, in the World Cups, and I want to compete at the highest level.
"I want to put myself in positions where I'm performing in front of millions of people."
Reiten gives Chelsea edge over defending champions Lyon
Guro Reiten secured Chelsea the advantage in their quarter-final against defending champions Lyon in the Women's Champions League.
The Norwegian curled home after 28 minutes in France to hand the Blues a 1-0 lead ahead of the reverse fixture in London.
Lyon were guilty of missing a number of opportunities in the first half, although Lauren James could have added a second for Chelsea when she hit the post.
Delphine Cascarino similarly struck the woodwork for Lyon after half-time, with the eight-time champions now needing a turnaround in the second leg if their title defence is to continue.
Retegui earns Batistuta comparison from Italy coach Mancini
Argentina-born Italy striker Mateo Retegui reminds Roberto Mancini of the Albiceleste's Serie A great Gabriel Batistuta.
Retegui has been handed a first Italy call-up for this month's Euro 2024 qualifiers, starting at home to England on Thursday.
The Tigre striker, who was born and raised in Argentina, where he has also spent his entire club career, qualifies for the Azzurri through his grandfather.
Strikers travelling between Argentina and Italy is not a new phenomenon, but Retegui is heading for the Italy camp, rather than a Serie A club.
"Coming like this from Argentina to Italy, not in a club team, is not so simple," coach Mancini said on the eve of the England game.
"It takes some time, but the guy is polite and smart. He is a good striker, young, we have great confidence and we have to give him some time."
Retegui has scored 28 goals in 48 Argentine Primera Division games for Tigre.
While Mancini noted comparisons with former Napoli striker German Denis, he preferred to draw parallels with the great Batistuta.
Batistuta joined Fiorentina from Boca Juniors in 1991 and was a great success both with the Viola and with Roma.
"[Retegui] is a classic striker, I see that many compare him to Denis," Mancini said. "I remember when Batistuta arrived in Italy, he reminds me of him.
"Clearly, he is a young guy and needs time and to grow. But I don't think it will take long to settle in."
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