He has one year left on his contract at Old United and the option of a second season. Despite scoring 24 goals in all competition last season, United missed out on a place in the playoffs because they finished sixth in the league.
According to sources, there are doubts about United's ambitions after failing to make a signing so far this summer, and thatRonaldo wants to spend the rest of his career in the European Championship.
The new manager, who is set to lead his first day of preseason training at Carrington on Monday, is banking on havingRonaldo in his team.
According to sources, Ten Hag and John Murtough have switched their focus to a more versatile forward after missing out on Darwin Nunez, who was a target for the Reds.
Although the Brazilian is interested in joining, the valuation of the club is proving problematic.
The main priority for United this summer is to sign a centralMidfielder with talks progressing with Barcelona over a move for Frenkie de Jong
According to sources, there is a belief on both sides that an agreement is close and there is hope that De Jong can still be part of the squad which leaves for a tour of Thailand and Australia in July.
Christian Eriksen is expected to make a decision about where he will play next year.
After Spurs' interest in the free agent waned, United and Brentford are in pole position to sign him.