Jessica Pegula, the American third seed, began her campaign at Flushing Meadows with a straight-sets win

Krejcikova gets in a muddle after squandering a 40-0 lead on serve. Deuce. She fights back though. Wins the game with a lovely serve down the T. All square at 2-2.

Paolini delivers a dominant effort on serve to change ends at 3-2 up.