Re: how many slams do the following playing have in them?
A precise numerical forecast is pointless, but be mindful all top 4 are already beyond the best tennis age. Statistically the most likely age to win a slam is 23, only a small fraction of slam titles are won after the age of 26.
Wwe may be close to the end of an era, even though it doesn't feel that way yet. I doubt Federer, Nadal, Djokovic and Murray will win another 10 slams combined.
Current sanyaku ranked players:
Yokozuna: Novak Djokovic (Dai-Y), Roger Federer (Dai-Y), Rafael Nadal (Dai-Y)
Ozeki: Stan Wawrinka, Andy Murray (kadoban)
Sekiwake: Marin Cilic (ex-Ozeki), Richard Gasquet
Komusubi: Jo-Wilfried Tsonga (ex-Sekiwake)
Active ex-sanyaku ranked players: Ozeki: Del Potro, Hewitt, Berdych, Ferrer. Sekiwake: Baghdatis, Haas, Raonic, Nishikori. Komusubi: Robredo, Ginepri, Gasquet, Verdasco, Melzer, Monfils, Youzhny, Janowicz, Dimitrov, Gulbis, Kyrgios