Nathaniel Clyne has been given a 10-day deadline by Ronald Koeman to accept Southampton's latest contract offer Getty

Nathaniel Clyne is set to snub a new deal at Southampton to complete the much talked about move to Manchester United in the summer, according to the Daily Mirror.

The defender's contract with the club expires next summer and the manager had given him a deadline of 10 days to agree to a new deal. However, Clyne has reportedly decided otherwise and is set to complete a move to Old Trafford in the summer.

United have already prised Luke Shaw from the Saints last summer and a move for Clyne will significantly improve their defence on the right, where they have currently deployed Antonio Valencia ahead of an injured Rafael.

They will face competition from Chelsea, who are also interested in a move as cover for Branislav Ivanovic, but the Red Devils are favourites for his signature, as he will see more opportunities to feature in the first team with the 20-time champions.

It will be a massive boost for United, who are looking to shore up their defence and have been linked with a move for Mats Hummels from Borussia Dortmund. However, the move has come to a standstill after Dortmund apparently want their new manager Thomas Tuchel to have a say in the transfer dealings in the summer.

The Red Devils have lost three games on the trot, the first time in over a decade, putting massive pressure on Louis van Gaal, who has to take six points from their remaining three games to restrict Liverpool and Tottenham for a top-four finish.

The 1-0 defeats at the hands of Chelsea and West Brom, along with a 3-0 loss to Everton has put a massive dent on the Dutchman's credentials this season, who had warmed up to the United fans after all but overturning their woeful campaign under David Moyes.

However, should he fail to secure a top-four spot, having spent more than £150m in the summer, it will open up an opportunity for the likes of Jurgen Klopp and others to stake claim for the coveted job as the United manager.