Rafael Nadal : `~Matches Lost`: Roger FedererRoger Federer : `~Matches Lost`: Marat SafinMarat Safin : `Matches Lost`: Roger Federer. Roger Federer : `Country`: The London 2012 Summer Olympics
[Human]: I think Rafael Nadal is great. What about you? [Assistant]: Yes I agree with you on that, but he lost to Roger Federer recently. I prefer women's tennis though [Human]: Nice! Who is your favorite player? [Assistant]: I like Serena Williams but I like Roger Federer too. Do you like him? [Human]: I like him as well. Did he lose against Marat Safin? 
No, Marat Safin beat him at the 2012 Summer Olympics in London.