Cristiano Ronaldo 'worried' by Manchester United 's lacklustre transfer window business

Cristiano Ronaldo is said to be growing concerned by Manchester United's lack of movement in this summer's transfer window.

United are yet to make any new signings this summer and have watched on as Manchester City, Liverpool, Tottenham and Arsenal have all been busy bolstering their squads, with Chelsea the only other major rival not to have spent a penny thus far.

It's widely accepted that United need to make some signings this summer after recording their lowest points total of the Premier League era last year, and according to AS, the slow start to the window has left Ronaldo concerned about his future at Old Trafford.

The 37-year-old, who has 12 months to run on his United contract - the club have the option to extend that by a further season - is worried that he may be set to endure another season of struggle and does not want to spend the limited time he has left at the highest level playing catch-up to the teams around him.

Not only is it United's lack of improvement which is a concern for Cristiano Ronaldo, but it's the significance of rival teams' business. Erling Haaland has joined City and Darwin Nunez has signed for Liverpool, and the fear is that United could be even further behind those two sides now.

The report claims that Ronaldo is no longer as convinced that he wants to stay at United for the remainder of his contract, although he is unlikely to make any decision so early in the transfer window.

Cristiano Ronaldo: Manchester United transfer activity and linked players:

It's not for a lack of trying, though. United are continuing to work hard to get the players that Erik ten Hag has identified to improve his squad. The new manager wants at least five new faces with Frenkie de Jong, Christian Eriksen, Antony, Jurrien Timber and a reserve goalkeeper the current targets.

Meanwhile, it looks like Anthony Martial may remain at Old Trafford this summer despite his desire to leave. The Frenchman has scored eight goals for United in the last two seasons and flopped during a four-month loan spell with Sevilla this year.

Sources say "nobody is breaking the door down" to sign Martial after a campaign where he managed two club goals and four starts for United.

Manchester United have reportedly been told they will have to spend €86m if they are to sign Frenkie de Jong from Barcelona this summer.

United are looking to sign two Ajax players this summer, according to a report. The Times suggest Erik ten Hag is looking to raid his former club for both winger Antony and defender Lisandro Martinez.

Manchester United are considering a move for Watford goalkeeper Daniel Bachmann as they look to bring in experienced back up for David de Gea. The impending departure of Dean Henderson to Nottingham Forest, which could be completed this week, leaves Erik ten Hag short of cover behind Spain international De Gea.

According to MEN, Aaron Wan-Bissaka and Brandon Williams have been told they are free to find a new club. The two English full-backs are among a list of players that may follow the likes of Paul Pogba and Jesse Lingard out of the club ahead of a rebuild under new manager Erik ten Hag.

Christian Eriksen has snubbed the opportunity to link up with Manchester United because he wants to remain in London, claims The Guardian. The Danish playmaker is currently out of contract after taking in a brief spell at Brentford, but the Bees would be open to doing another deal while Tottenham are also said to be keen on a player they know well.