The 22-year-old has impressed for United this season after a string of injuries at Old Trafford handed the defender his chance.
Varela was the first signing former United boss David Moyes made at the club.
The young defender could make his first cap for Uruguay in their friendlies with Brazil and Peru in March.
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Being an amiable guy is good for you and Jurgen Klopp is living proof.
Summer 2016 is set to be a very exciting time for football fans, as this is when the long awaited Euro 2016 tournament kicks off.