Multi-Slam winners Djokovic, Nadal, Federer and Sampras are all between 6' to 6'2. Other Grand Slam winners who only won 1 or 2 Slams like Safin and Del Potro are 6'4+ but dealt with many injuries also which hampered their careers. Lendl, MacEnroe, Agassi, Becker, Edberg, Courier, Connors etc also were either near 6' but no more than 6'2 or so. Of course there are exceptions like Laver although the sport and its players evolve. But generally multi-Slam winners are at the 5'11 to 6'2 mark. So judging by this, is it likely that we will not see monsters like Del Potro and giants who come along in the future winning more than a Slam or two at best? Is it primarily just in the cards based on tennis' history?