It may not be immediately obvious from the minimal fanfare she generates compared with many of her compatriots, but Jessica Pegula is the highest ranked US tennis player, man or woman, and throughout this summer she has continued to back it up.
On Arthur Ashe Stadium against an in-form multiple grand slam champion, Pegula, the No 8 seed, took another significant step forward in her career by routinely dismantling Petra Kvitova 6-3, 6-2 to reach the US Open quarter-finals for the first time.
