Marcus Rashford suffered a worrying-looking injury during Manchester United's 2-0 victory over Everton after he went off holding his groin.
The 25-year-old appeared to clutch his right leg after stretching for a high ball, before limping off the turf and down the tunnel. Wout Weghorst replaced the injured Rashford for the final 10 minutes at Old Trafford.
That soured an excellent overall performance from the Red Devils, who were superb throughout and had a number of opportunities to score more goals. Scott McTominay gave United the lead in the first-half, before Anthony Martial doubled their advantage after the interval following excellent work from Rashford.
But Erik ten Hag will no doubt be worried about Rashford's condition as he looked in a lot of pain as he strutted off the pitch and wasn't walking comfortably at all. The England international was a threat all afternoon and gave the Red Devils an added dimension in attack, despite failing to find the back of the net.
This also comes after Ten Hag slammed his side's fixture congestion before the game. It was United's third match in six days, having travelled to Newcastle last Sunday and Brentford on Wednesday.
United then have to play Sevilla in the Europa League first-leg, before another Premier League game against Nottingham Forest next weekend. The Red Devils could play another staggering 15 matches before the end of May - which would take them to over 60 in one campaign.
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Rashford recently pulled out of the England squad through a minor injury - and it looks as though the sheer amount of matches is taking its toll on him. Former United midfielder Paul Scholes is hoping it is just a precaution and it is nothing serious as United head into the business end of the season.
Scholes told BT Sport: "He's been brilliant for us this season, you never quite know with Marcus, he does tend to go down quite a bit with injuries then all of a sudden pops up and makes a miraculous recovery. I’m just hoping it’s maybe a little bit of fatigue or a little bit of cramp."
Any injury to Rashford will be a massive blow for the Red Devils given his goal record so far this season. He has scored 28 goals in 47 matches - the most he has netted in a single campaign since his debut in February 2016.
Ten Hag added: "We have to be more clinical, this game has to be finished by half-time. It was a good performance and it's very good if you do this with three games in six days so it's a compliment to the team.
"We have to wait [on Rashford's injury], it doesn't look good. Once again it's due to the schedule, you can't play three games in six days. We have to protect our players.
"Everyone wants the best players on the pitch, everyone wants to see great entertaining football like today. But you need your best players. It's a win and we have to move on."
As for United, they climbed back into third in the Premier League and strengthened their grip on a Champions League place for next season. Newcastle can leapfrog them when they play Brentford at 3pm.