Please enlighten me: why isn't Nadal garanteed a spot in the semis since he beat Tsitsipas today? I mean, if Zverev wins there will be three players with 2-1 record. And in head-to-head, Zverev has beaten Nadal, Nadal has beaten Tsitsipas and Tsitsipas has beaten Zverev... Who gets to be winner and runner-up? Confusing...
EDIT: ok I think I get it, when two are tied it's the hth record, but when three are tied it's the % of set won...