Jose Mourinho
Jose Mourinho has spent nearly £150m in his first transfer window Getty

Gary Neville says Jose Mourinho wants to do "big business" and has backed Manchester United to spend heavily in the next two transfer windows.

The Portuguese tactician took charge at Old Trafford before the start of the 2016/17 season and in his first transfer window, he spent close to £150m ($185.9m). This includes a world-record signing of Paul Pogba from Juventus for £89m ($110.3m) and also the arrival of Zlatan Ibrahimovic on a free transfer.

Pogba and the former Barcelona and Paris Saint-Germain striker have been the two key players for the Red Devils this term. Neville believes Mourinho will require to bring in his players in order to change the mentality of the squad.

"I think Jose Mourinho will want to do big business in the next couple of transfer windows. I think to shift the mentality of the whole squad he'll still need to do some more," Neville told Sky Sports, as quoted by the Manchester Evening News.

The 20-time English champions are linked with a move in signing Benfica defender Victor Lindelof in January. The Swedish international is also willing to make a switch to the Premier League half way through the current campaign, instead of waiting until the next summer window.

Memphis Depay and Morgan Schneiderlin have struggled for playing time under the former Real Madrid and Chelsea manager. The Daily Mail reports that Ronald Koeman is an admirer of the duo and wants to sign them on loan for Everton in January. Mourinho has explained his plan for United in the upcoming transfer window, suggesting he will not stop a player from leaving Old Trafford.

"I am quiet and calm and see what happens. As I was saying, I would like to keep my squad the same," Mourinho explained, as reported by Sky Sports.

"But as a manager I never feel I have the right to stop people to try to be happier and to try to give a different direction for their careers. So if the conditions are right for the club and that moment arrives during the month of January, then we will have to react so let's see what happens.

"But if you ask me in this moment, am I waiting for someone to be here on January 1, or are we chasing some player because on that date we want to have here a new player? Not at all."