Iga Swiatek didn't get much to run with against Jessica Pegula in the US Open quarterfinals.
The 30-year-old American's flat groundstrokes opened the court spectacularly and had the world No.1 Pole on the run for most part of their tenth career meeting. The 23-year-old Swiatek didn't recover from the 0-4 start to the match with serve and nerve deserting her.