United had been pursuing the Uruguay international throughout the summer but getting a deal over the line proved troublesome as negotiations with the French side dragged on. However, the two teams reportedly came to an agreement over a £51 million ($60m) deal earlier this week, freeing up Ugarte to finalise the transfer on the final day of the window.

Ugarte has signed a contract that runs until 2029 with an option to extend for a further 12 months, the English club confirmed.

“It is an incredible feeling to join a club of this magnitude; one that is admired all around the world," the player told the club's website. "The project that the football leadership discussed with me is extremely exciting; Manchester United is an ambitious club and I am an ambitious player.

"The passion of supporters is something that is very important to me; I know how incredible United fans are and I cannot wait to experience Old Trafford. I’m someone who is so determined to succeed; I will sacrifice and give everything for my teammates. Together we will fight to win trophies and reach the level where this club needs to be."

The Premier League side were looking to bolster Erik ten Hag's midfield options, having already strengthened in defence with the arrivals of Matthijs de Ligt, Leny Yoro and Noussair Mazraoui, and enhanced the attack by signing Joshua Zirkzee from Bologna.

Ugarte, 23, joined PSG from Portuguese side Sporting CP last summer but was unable to establish himself as a regular starter under coach Luis Enrique. He started 21 of the 25 Ligue 1 games in which he featured and the French champions went on to sign Joao Neves from Benfica in a big-money deal, clearing the way for Ugarte to be sold.

Ugarte will have to adapt quickly to his new surroundings as United hope to benefit from his arrival in their bid to improve on last season's eighth-placed Premier League finish. They take on fierce rivals Liverpool at Old Trafford on Sunday.