That is a question for Ole Gunnar Solskjaer and his staff, who will assess the 26-year-old at the Aon Training Complex this week ahead of Sunday’s much-anticipated Premier League opener against Chelsea.
The big 16:30 BST kick-off at Old Trafford will provide United with a fantastic opportunity to make an early statement in the 2019/20 campaign, after winning all six of the club’s friendly fixtures, the final one on penalties, over the summer.
Maguire is yet to play a match with his new Reds team-mates, of course, but the talented centre-back is presumably close to full fitness after taking part in Leicester’s own pre-season campaign in England.