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Cristiano Ronaldo has reportedly demanded Manchester United up their game in the transfer market - or he'll leave Old Trafford this summer.

The 37-year-old wants to help the Red Devils get back to the glory days under new manager Erik ten Hag but is concerned by the fact United are yet to make a signing since the summer window opened. Portuguese outlet Record claim that Ronaldo believes in the attacking football Ten Hag wants to play but his club's struggles in the market are putting him on the verge of a 'nervous breakdown'.

Having spoken to the former Ajax boss several times since his hotly-anticipated appointment, the five-time Ballon d'Or winner is keen to be part of his plans. However, it's added in the report that Ronaldo has confided in his close circle that either the Red Devils get on with doing business to back Ten Hag or he'll be searching for new club ahead of next season amid links of a shock return to Juventus, who he left last summer to sensationally return for a second spell in Manchester.

The Portugal captain is contracted to United for another campaign, having netted 24 goals in 37 appearances last term, leading to him winning the club's famous Sir Matt Busby Player of the Year award.

Ronaldo has already dished out plenty of his praise for his new manager, notably telling manutd.com : "What I know about him is he did