Dorgu struck a spectacular goal for United as they won 3-2 in London on Sunday, however he was forced off clutching his hamstring later.
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“Pat’s been a big player for us, obviously he’s scored two goals but in terms of the threat and athleticism and quality, he’s been immense down the side with Luke (Shaw) against two teams that ask a lot of questions,” said Carrick.
“I am delighted for him because the two goals he’s scored are very different goals. It's nice to see him smiling and happy.
“He obviously came off with, hopefully, a little bit of cramp, hopefully, it's nothing worse.
“At this stage, it's hard to tell, so we'll just have to wait and see. Hopefully it's not too bad.”