Mats Wilander: I think this year Rafael Nadal becomes GOAT on paper

Eurosport tennis expert Mats Wilander believes that world No. 2 Rafael Nadalwill become the "greatest of all time on paper" this season as he also underlines the Spaniard and Roger Federer can't be compared on the court. Federer, 38, has won a record of 20 Grand Slam titles but 33-year-old Nadal is threatening to soon equal that record as the Spaniard will be the main favorite to win his 20th Major title at the French Open. "I think this is the year when Rafa Nadal will become the grea