Manchester United star Gary Neville has called on the club to deal with Cristiano Ronaldo's situation 'decisively and quickly'. The news comes as it is reported that Ronaldo's agent has been in contact with other clubs over a potential move. While the future of the Portuguese star at United is uncertain, the recent injury to Paul Pogba and his emergence as a first-team regular has raised transfer speculation.Gary Neville urges Manchester United to deal with Cristiano Ronaldo's situation 'decisively and quickly'Former United star Gary Neville has called on Manchester United to deal with the situation surrounding Cristiano Ronaldo as quickly as possible. The ex-England international has been linked with a move away from Old Trafford due to his desire to leave the club. Neville has urged United to deal with Ronaldo's situation quickly to avoid losing focus on their new coach, Erik ten Hag.Having lost a penalty against Middlesbrough in the last game, Ronaldo's absence will surely disappoint Manchester United's tour sponsors. The Portuguese international's absence also presents a problem for Ten Hag, as pre-season is an important time for him to establish his ideas and build up the squad's fitness. Gary Neville has called on Manchester United to deal with the situation 'decisively and quickly'.It is currently unknown when the 29-year-old will return to training with Manchester United, but it is likely that he will miss the second day of the club's pre-season tour of Thailand. However, he may still be able to join the squad there, although his return is far from guaranteed. It is also unknown if he will be available to play on the first weekend of the season against Brighton and Hove Albion.While the five-time Ballon d'Or winner previously expressed a desire to stay at Old Trafford, it is now believed that he has withdrawn from the club's first pre-season training camp and is seeking a move away from the club. Ronaldo's absence has been blamed on family issues and has been seen training at a Portugal national team training ground. He could even miss the club's pre-season tour if he cannot get a move before the transfer window closes.After a meeting between the two managers last month, Manchester United confirmed that they would listen to offers near PS12.9 million. The club have been linked with Chelsea and Napoli, although Neville believes the decision will ultimately rest with the new manager, Thomas Tuchel. The two players have been training together for two seasons at Manchester United and are both very good for each other.Ronaldo's agent has been in contact with clubs about a possible moveBayern Munich, Paris Saint-Germain and Chelsea are reportedly not interested in signing Cristiano Ronaldo. However, Atletico Madrid and Liverpool have been linked with a move for the Portuguese international. The report suggests that these two clubs are unable to afford Ronaldo's current wages. According to Mendes, the Portuguese forward is willing to accept a 30% wage cut, which would still mean a huge PS 300,000 a week.The agent's contact with other clubs has come as no surprise, since the Argentine superstar is nearing his 38th birthday. Manchester City are reportedly interested in signing Ronaldo, and they could benefit from the favourable tax laws in Italy. Sporting Lisbon are also interested in signing the Portugal international. Apart from Sporting Lisbon, another Portuguese club is reportedly in touch with Ronaldo's agent about a possible move.Manchester United are among the other clubs linked with Ronaldo. However, Chelsea's new co-owner Todd Boehly is reportedly in love with Ronaldo. Although, Thomas Tuchel has said that he would not sell Ronaldo, the possibility of a move to a rival club would be unthinkable. Also, a move to Barcelona could be on the cards. Mendes has met with Barcelona president Joan Laporta on Monday and he also held meetings with four of his clients - including Thomas Tuchel.According to the report, Cristiano Ronaldo's agent Jorge Mendes has been in touch with five clubs about a possible move. It is unclear whether Ronaldo will agree to a move to a new club or remain at Manchester United. Regardless of the situation, a move to another club would allow him to play in the Champions League next season. If he leaves Manchester United, his agent will be able to recoup EUR25 million in the process.Atletico Madrid have been linked with a move for Ronaldo. Manchester United still have two friendlies before the start of the Premier League campaign on August 7. Atletico Madrid and Manchester United have also been linked with a move for Ronaldo. A new coach, Van Ten Hag, will not want to keep Ronaldo against his will. Rather, he would want to start his tenure with a clean slate.Ronaldo's future at United is uncertainThe Portuguese star's future at Manchester United is uncertain, and his agent has opened the door to PSG. Ronaldo has been absent from United's pre-season training and has said that he wants to move on and play for a Champions League club. He has also spoken to Chelsea and Bayern Munich. It is unclear where his future lies, but his agent has said he'd accept any satisfactory offer.There is speculation that Ronaldo has handed in a transfer request to Manchester United, as the club have made a slow start to the summer transfer window. However, the forward is understood to be concerned about the situation in Old Trafford, and does not wish to spend his final season playing for a club with no realistic chances of winning the Champions League. He also wants to play Champions League football, something he's always wanted to do.Although United were initially tipped to sign a centre-forward this summer, the Portuguese star has been linked with a move to Serie A. The Italian side has recently won the UEFA Europa Conference League, and they are likely to compete again in the UEFA Europa League. However, Ronaldo's transfer to Roma would be a step down from Manchester United, where he has been a mainstay of the first team since signing from Real Madrid in 2011.According to reports, Ronaldo has offered Manchester United an ultimatum and wants to spend his final season with world class players. United would prefer to keep Ronaldo abroad, but Ronaldo has a one-year contract at Old Trafford and the option to extend it for another year. The club are also expected to announce the signings of Tyrell Malacia and Christian Eriksen, who have verbally accepted a three-year deal with the club.The Portuguese forward has been reportedly frustrated with Manchester United's lack of ambition and transfer activity. The new manager, Erik ten Hag, has repeatedly claimed that Ronaldo will be back before the Premier League starts. The new manager is unlikely to be swayed by the big name arrivals. Despite this, United has not let Ronaldo train at Old Trafford until after the talks.Pogba's injuryPaul Pogba has suffered a torn meniscus in his right knee, ruling him out of up to two months of action. The Frenchman left Manchester United in June, but returned to Juventus on a free transfer this summer. Juventus sold the France international for PS89million in 2016, but it appears the deal went sour. The player will be sidelined for up to two months and will miss Juventus' pre-season tour of Dallas.Manchester United have been preparing for a possible move for the French international in January, even though he is still under contract at the club. With no immediate replacement in the squad, the club are ready to accept a cut in compensation. Meanwhile, the club's director of football has expressed a desire to sign Pogba. This would be a perfect opportunity for the French midfielder to prove his worth to other Premier League clubs.Injuries are not the only problems facing the Frenchman. He has already missed two games this season. The midweek defeat to Liverpool may have been the last game in his second spell at the club. Fortunately, Ronaldo will be back in the squad for United's game against Arsenal, and Fred could return as early as Thursday. With the news of Paul Pogba's injury, transfer rumours have become even more intense.Juventus are also keen on signing a quality attacking midfielder. They have already signed Ivan Perisic and Rodrigo Bentancur but they are also interested in signing a third wing-back. With Paul Pogba's knee injury, this deal has a chance to be re-considered. There are a few other possible targets for Juventus this summer.While Manchester United are focusing on the on-field situation, their fans have been booing the Frenchman's every move. However, they will try to concentrate on their game against Arsenal, where Pogba will be a major absence. Nevertheless, Manchester United and Arsenal remain in contention for a Champions League spot, and the Frenchman's injury won't change that. With that, they may be able to get rid of Pogba.