United, currently third in the Premier League ahead of Monday’s showdown with Leeds, are on course for Champions League qualification for next season, when they will need a bigger and better squad.
Replacing Maguire’s experience would have cost a small fortune, particularly at a time when there remain fitness doubts about United’s other two leading centre-backs.
Matthijs de Ligt is not certain to play again this season as United explore solutions for a back complaint that has kept the Dutchman out since November. Lisandro Martinez has also been sidelined recently with a calf injury following his return from a long-term absence with a cruciate knee ligament injury.
United also have youngsters Leny Yoro and Ayden Heaven on their books, but both are continuing to learn their trade and have yet to establish themselves as regular starters under Carrick.
It remains to be seen if Maguire is included in England’s World Cup squad this summer. He played in the 1-1 draw against Uruguay and as a substitute in the 1-0 defeat by Japan last month, but Thomas Tuchel has indicated he is currently fifth in the centre-back pecking order.
Nonetheless, he continues to be a big influence at United with Jason Wilcox, United’s director of football, describing Maguire as the “ultimate professional”.
“Harry represents the mentality and resilience required to perform for Manchester United,” Wilcox said. “He is the ultimate professional who brings invaluable experience and leadership to our young, ambitious squad. Harry, like everyone at the club, is completely determined to help Manchester United to achieve regular and sustained success.”
United are in Dublin this week for a training and bonding camp ahead of their final seven games of the campaign. Carrick’s squad are training at Carton House in Maynooth, around half an hour outside Dublin city centre.