Real Madrid icon Marcelo puts Lionel Messi ahead of Cristiano Ronaldo as his 'toughest' opponent

From Yahoo! News

The age-old debate between Lionel Messi and Cristiano Ronaldo has seen another heavyweight chime in with a definitive verdict. Despite spending nearly a decade as a teammate and close friend of the Portuguese superstar at Real Madrid, former Brazilian international Marcelo has revealed who truly caused him the most problems on the pitch.