When he has succeeded with just 24 per cent of those , he has claimed a staggering 78 per cent of sets .
For Rafa the most potent Key to the Match is winning points on first - serve returns .
When Rafa has succeeded with just 24 per cent of those , Rafa has claimed a staggering 78 per cent of sets .
For Rafa the most potent Key to the Match is winning points on first - serve returns .