When Manchester United must complete Casemiro transfer by for him to make debut vs Liverpool FC

Manchester United must complete the signing of Real Madrid midfielder Casemiro and register him by 12pm on Friday if he is to make his debut against Liverpool at Old Trafford on Monday evening.

As reported by the Manchester Evening News on Wednesday, United, who are being linked with a plethora of players ahead of the transfer window closing in just under a fortnight's time, have approached Madrid about the prospect of signing the Brazil international. The Reds are desperate to strengthen their midfield options ahead of the 11pm deadline on September 1 and the 30-year-old has shot right to the top of their wish list.

It is understood that United are now making advances in their efforts to bring him to Old Trafford and negotiations with his representatives are ongoing. The Brazilian reportedly sees playing in the Premier League as a challenge that he has always wanted to experience.

READ MORE: Real Madrid star reveals Casemiro wish amid Manchester United transfer interest

Under contract at the Bernabeu until the summer of 2025, United will have to part with a hefty fee to lure him to M16. However, he is considered as one of the very best defensive midfielders in the world, meaning it would be money well spent.

If United are serious about getting him through the door as quickly as possible and have plans for him to feature in Monday's clash with Liverpool, they must secure his signature and register him with the Premier League by midday on Friday. Premier League rules state that any new signing must be registered by midday on Friday ahead of the latest round of weekend fixtures.

The Premier League rule book states: Subject to the provisions of Rule V.1, the deadline for receipt by the Board of all duly completed documents