Manchester United boss Jose Mourinho could extend his spending spree this summer after being given the backing to spend another £100m on new signings.

The Special One has already spent £106m on Romelu Lukaku and Victor Lindelof in the transfer window, but this is only the start of what could be a busy summer for the Mancunian giants.

The Red Devils have been negotiating deals for a whole lot of players in recent weeks but they have been left disappointed with clubs sticking to their asking price. According to The Sun, the Special One has been given the go-ahead to pursue a deal for Perisic after having failed with an initial £26m approach for his services.

The Croatia international is considered as one of the most valuable players in the Inter Milan ranks, but Mourinho is confident that a fresh attempt of £35m would be sufficient to convince the Nerazzurri into a sale. Meanwhile, Mourinho could also move for another defender during this summer’s transfer window while the search for a central midfielder is still on with Tottenham Hotspur’s Eric Dier and Roma’s Radja Nainggolan leading the shortlist.

An Old Trafford source is quoted as saying: “The club have already invested a lot into the playing squad this summer. But there is still a lot left in the coffers and it’s all there for Jose to spend on whoever he likes. Lukaku and Lindelof were just the start of what is going to be a busy summer at Old Trafford with lots of ins and outs. This is going to be a huge window for the club with loads of players leaving and plenty coming in as well.”

Meanwhile, United are also busy offloading their fringe players after having sold Adnan Januzaj to Real Sociedad on a £9.7m deal while Wayne Rooney had his contract cut short in order to realise his comeback with Everton.