Babel and Talisca scored one each as Besiktas picked up their first win at home in the Champions League since November 2007.
While Ronaldo won the Spanish league and Champions League at Real Madrid, Messi and Neymar collected only the Copa del Rey title with Barcelona.
The 18-year-old Mbappe joins PSG on a season-long loan in what could ultimately be world's second most expensive signing after Neymar was signed earlier this year for $261 million.
The legends will face-off for the title of World's Best Player again after FIFA released its shortlist on Thursday.
Neymar's potential transfer from Barcelona to PSG will be the most expensive in football history at $263 million.
The Brazilian football star has been called for training on Wednesday morning but Spanish media doubt he will show up amid speculation that the 25-year-old could quit Barcelona for Paris Saint-Germain.
Ronaldo explains that he did not create a special structure to manage his image rights after joining Real from Manchester United in 2010, saying he utilised the set-up which was deemed "legal and legitimate" by English tax authorities.
Brazil's football legend will join six other former international stars for exhibition matches in Pakistan which has been off limits for foreign sports teams since 2009 due to security concerns.
Brazilian soccer club Chapecoense played its first game in memory of those who died in the crash two months ago while en route to Colombia.
Clubs, players and fans from around the globe send tributes and support to Brazilian side Chapecoense.
The Chapecoense de Brasil footballers were due to play in the finals of South America's version of the Europa League. Three players are among the five survivors.
Cristiano Ronaldo strikes winning Barcelona's 39-game unbeaten run in El Clasico
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