Roger discusses degree of difficulty facing Rafa at RG.
Dominic Thiem faces toughest task to win his first Grand Slam.
Amanda Anisimova can win RG if she does these two things, says Simona Halep.
After rain washes out play, RG tournament director Guy Forget says a Sunday women's final is possible.
Boris Becker and John McEnroe have different views on status of Slams.
Dominic Thiem says Serena has "a bad personality" after RG tiff; John McEnroe and Whoopi Goldberg back Williams.
Unpredictability is good for the game, says Hall of Famer.