13 aces vs 0 double faults, 70% 1st serves made, 91% 1st serve points won, 81% serve points won, 0 service games lost

43% 1st return points won, 52% 2nd return points won, 3 breaks in 9 return games.

Almost flawless performance on both ends

Any particular reason why these are all hard court matches? Or were there just not that many high quality clay or grass matches this year?