BERLIN (REUTERS) - Reports linking four-time Champions League winner Cristiano Ronaldo with a possible move to Bayern Munich if the Portuguese star decided to leave Real Madrid were a hoax, the German champions said on Monday.

Bayern president Uli Hoeness has pledged a big-name signing in the close season and Italian media had reported in recent days that the German champions were interested in Ronaldo.

"We are used to a lot of speculation about possible comings and goings during the transfer period," said Bayern chief executive officer Karl-Heinz Rummenigge in a club statement with the headline "Hoax of the Day for the Ronaldo rumours".

"As a rule, we do not comment on these rumours but now in the case of Cristiano Ronaldo, we want to make it clear once and for all that this rumour lacks any foundation and must be confined to the real of fables."

Ronaldo is seen as likely to leave Spain despite winning the Champions League for a second season in a row with Real following accusations of tax fraud in the country.

According to reports in Portuguese media, the 32-year-old four-time world player of the year had already made up his mind to ask the club for a transfer, saying he was "deeply disenchanted" with the allegations against him.

Spanish prosecutors have filed a lawsuit against the player accusing him of defrauding tax authorities of €14.7 million (S$22.7 million) by hiding his image rights income between 2011 and 2014.

Ronaldo has denied any wrongdoing.