Roberto Martinez is keeping his fingers crossed Kevin Mirallas has not suffered a serious injury after he was carried off in the final moments of Everton's 3-1 victory over QPR.
The Belgian was chopped down by Jordon Mutch in stoppage time, with his ankle appearing to buckle.
Mirallas missed almost two months of action earlier this season after tearing his hamstring but Martinez is hopeful a scan on Tuesday will not bring further bad news.
The forward left Goodison Park in a boot and on crutches, and manager Martinez said: "There's clear damage in his ankle.
"I don't know if it's going to be ligament damage or something else. We're going to scan him in the morning. It doesn't look too bad. It's swollen straight away, which is a good sign."
Mirallas' injury took the gloss off a result that ended a run of four matches without a win for the Toffees.
It was not the most comfortable night for the hosts, with fans voicing their frustration at the beginning and end of the match, but it was nevertheless a fair result.
Ross Barkley and Muhamed Besic stood out in midfield, and it was the former who set Everton on their way with a run and rasping shot into the top corner in the 33rd minute.
A heavily deflected free-kick from Mirallas made it two before half-time and Steven Naismith added a third in the 53rd minute before Everton took their foot off the gas and Bobby Zamora grabbed a late consolation.
Martinez said: "Ross Barkley, I thought it was a real joy to see him. The way he scored the first goal, he's the one that started the move, he gets through the line of the QPR midfield and then the way he finishes from outside the box is quite exceptional.
"He deserves that outcome because of the work he's put in in training, the way he shows his personality to get on the ball, to want to create, his performance was very impressive.
"It's a really important victory for us. It's important to get momentum, it's important to get confidence, and you can only get that by having good results."
QPR have yet to pick up a point away from home this season and manager Harry Redknapp was left frustrated with his team's inability to exploit the nerves and frustration around Goodison.
"They were poor goals, and that was the problem," said Redknapp.
"Until they scored their first goal, I've never felt so comfortable. I thought, 'We've got a big chance here tonight'.
"The first goal, we gave the ball away cheaply. It's a great strike from a fantastic young player, but it took a deflection that certainly changed the direction of the ball.
"Then the second one we gave a silly free-kick away, another deflection and we're 2-0 down at half-time. I don't think we deserved that.
"The crowd was edgy, I thought they played edgy. Even at 3-1 with 10 minutes to go, they weren't exactly full of confidence."
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