Manchester United urged to sign Harry Kane or Robert Lewandowski by Old Trafford hero

Former Manchester United centre-back Gary Pallister thinks the Old Trafford club should try to sign Harry Kane or Robert Lewandowski. The Red Devils have lacked firepower this season and Pallister thinks they need to sign some attack-minded reinforcements this summer.

However, the ex-United star has cautioned the club against re-signing Cristiano Ronaldo, warning it could stunt the development of Marcus Rashford, the 18-year-old academy product who has burst onto the scene this season. He warned, too, that United may find it difficult to sign top players if they fail to qualify for the Champions League.

"Harry Kane and Robert Lewandowski are the kind of players United could look at," Pallister explained, according to the Manchester Evening News. "There's a lot of talk about Cristiano Ronaldo, too, who'd be a great threat, but you don't want to stunt the growth of Marcus Rashford.

"He's come out as if he's been playing on the big stage for years – and he's only 18. It's hard to get players if you don't qualify for the Champions League but if there's a chance to play for Manchester United, you'd be foolish to pass that up."

Meanwhile, United have been strongly linked with a move for Benfica's teenage midfield star Renato Sanches. The dynamic 18-year-old is reportedly seen as the ideal antidote to the lack of dynamism and creativity in United's midfield, which has contributed to their paltry goals return.

Sanches' potential signing has also been linked to the rumoured move for Jose Mourinho this summer, as both men share the same agent, Jorge Mendes. Mourinho is said to have followed the player's progress at Benfica and is reportedly open to the idea of coaching him at United next season.