William Hill 開的賭盤供參考：
Novak Djokovic to win more than 20 Grand Slam Singles Titles (Djokovic 超過20個大滿貫）
賠率1.67倍
Novak Djokovic to have won more Grand Slam Titles then Federer or Nadal by the time they all retire （三人退休的時候，Djo大滿貫最多）
賠率5倍
目前大滿貫數：Federer 20, Nadal 17, Djokovic 15