Nemanja Matic has warned Manchester United need quality signings this summer if they are to challenge for the Premier League and Champions League as the midfielder admitted the club’s trophyless campaign has cranked up the pressure for next season.

Mourinho ideally wants to bring in five new players this summer but knows the truncated transfer window, which is compounded by the month long World Cup finals in Russia, will reduce the time to complete deals and make acquiring such numbers increasingly difficult. They include two full backs, a centre-half, a midfielder and a winger.

The United manager will also be under pressure to offload peripheral players, such as Matteo Darmian and Daley Blind, to accommodate space on the wage bill and avoid a bloated squad.

If Marouane Fellaini fails to agree a new contract, Mourinho would be left needing two midfielders following the retirement of Michael Carrick, a scenario which could impact on plans to strengthen elsewhere.

Defeat to Chelsea in the FA Cup final at Wembley ensured United finished without a trophy and the prospect of Liverpool winning the Champions League against Real Madrid on Saturday would be another kick in the teeth to Mourinho after a campaign in which he has seen the club’s other biggest rival, Manchester City, run away with the title. Pep Guardiola’s side amassed a century of points and finished 19 ahead of United, in second.