Manchester United fans will be disappointed after watching the Red Devils lose 4-1 to Liverpool in pre-season.

The two sides looked a world apart, and a visibly frustrated Jose Mourinho let his feelings be known during his post-match press conference. He lamented the lack of players available due to the World Cup and blasted the youngster who were on show. The Portuguese also hinted that United board needed to add to the squad this summer.

The former Chelsea boss has spent over £70m to bring Fred, Diogo Dalot and Lee Grant to Old Trafford. However, he remains to keen to add to their attack with Anthony Martial linked with a move away. To catch Manchester City, United need to add another world-class attacker.

That man should be Bayern Munich superstar – Robert Lewandowski. Valued at £76.5m by Transfermarkt, the Pole is one of the best strikers on the planet and could be set to leave the club this summer. According to the manager, Niko Kovac, Lewandowski ‘toys with going elsewhere’ but Bayern does not want to lose their prized asset.

Real Madrid are long-term admirers of the Poland captain, but United must beat them to his signature. Lewandowski has finished as top scorer in the Bundesliga in two of the last three season – he netted an incredible 29 goals in 30 appearances last year as Bayern cruised to another league title. Alongside Romelu Lukaku and Alexis Sanchez, Lewandowski would score goals for fun in the Premier League.

A truly world-class finisher, United would be unstoppable if they added the 29-year-old to their attack next season.

Manchester United fans, thoughts?