The legendary sisters' first doubles foray at Flushing Meadows in four years

Khachanov shocks third seed 6-7, 6-3, 6-2, 6-2

World number three dominates Kenin 6-3, 6-1

The Spaniard calls for changes as more players struggle with fatigue and injuries

World number two beats American teenager Thea Frodin 6-3, 6-2

He recovers from shaky start to beat Griekspoor

The Spaniard overcame Roman Safiullin 6-4, 6-4, 6-4 in first round

The Serbian great suffers defeat 7-6, 5-7, 4-6, 6-2, 6-1 against Navone

Polish star enters US Open with renewed confidence

Kazakh feels fit after heel injury setback