But La Liga chief Tebas has tried to reassure both Atletico and Real fans that their star players will not leave this summer.
Ronaldo said: 'In the coming days there will be answer about my future. The 33-year-old is certainly not considering a move to Major League Soccer (MLS), China, Japan or the Middle East at this point of his career.
United's executive vice chairman Ed Woodward has long-dreamed of luring the five-time Ballon d'Or victor back to Old Trafford.
The club is believed to have offered Ronaldo a new deal following his outbursts after the UEFA Champions League final in Kiev, Ukraine, where he lifted his fifth UCL title.
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He also warned that Britain "would not be ready in time" for Brexit and called for a referendum on the terms of the final deal. A UK Conservative MP has resigned as justice minister in protest at Prime Minister Theresa May's Brexit policy.
Ronaldo went the extra mile to make the fan's day.
"I think that Cristiano [will] stay at Real Madrid and Antoine Griezmann [will] stay at Atletico. We all want Ronaldo to stay and Neymar has our doors wide open", Marcelo said.
Despite yet another season in which Ronaldo won the Champions League with Real, rumours of the forward's potential exit from the club have surfaced once again.