Cristiano Ronaldo has not reported back to training at Carrington citing family reasons, which the club have accepted; Sky Sports News has been told Ronaldo’s agent Jorge Mendes has been selling the ‘Cristiano effect’ to clubs

Manchester United are unsure whether Cristiano Ronaldo will fly out with the team on Friday for their pre-season tour of Thailand and Australia.

The 37-year-old has not reported back to training at Carrington, citing family reasons, which the club have accepted.

Ronaldo’s absence comes amid informing United he wants to leave Old Trafford this summer if a suitable offer arrives.

Ronaldo was due to re-join his team-mates on Monday, but has instead been keeping fit at Portugal’s training base – Cidade do Futebol – for the past few days.

Sky Sports News has been told Ronaldo’s agent, Jorge Mendes, has spent the past few weeks selling the ‘Cristiano effect’ to clubs having compiled a dossier of his client’s immense sponsorship, social media and ‘new markets’ inpresented

Chelsea co-owner Todd Boehly is among the executives to listen to the pitch and is considering a move.

Bayern Munich, Barcelona and Napoli have also been engaged and while United insist Ronaldo is not for sale, that stance is expected to soften if a proposal from an overseas team is presented

The club do not want the situation to overshadow Erik ten Hag’s pre-season work or incomings, with full-back Tyrell Malacia set to be unveiled and Christian Eriksen verbally committing to join.

A basic agreement is in place with Barcelona for Frenkie de Jong, while advanced negotiations continue for Lisandro Martinez.

Ten Hag will have to expand his attacking targets if Ronaldo does exit with the club already concerned by their lack of goalscoring threat heading into the new campaign.

Ronaldo scored 24 times across all competitions last term, but United recorded their lowest-ever Premier League points tally.

If he misses the tour, it will be viewed as spelling the end of the Portugal international’s second stint at the club.

United begin their pre-season schedule against Liverpool in Bangkok next Tuesday, before friendlies with Melbourne City, Crystal Palace and Aston Villa in Australia