Toni Nadal believes Rafael Nadal will have to win more Grand Slams in order to finish with the all-time Grand Slam record and be considered as the GOAT. Nadal, 35, captured a record 21st Grand Slam title after beating Daniil Medvedev in the Australian Open final. Novak Djokovic and Roger Federer are tied on the second place with 20 Grand Slams each. “I do not believe it. Djokovic is the favorite for Wimbledon. At Roland Garros, I expect Rafael to win. I don’t know about the US Open anymore.The reality is that it’s becoming more difficult for them to win a Slam,” Toni told La Vanguardia. Toni doesn’t believe that 21 Slam title will be enough for Rafa to be the GOAT: I do not believe it. #D …