Fritz, Pegula and Navarro lead American charge into US Open third round

• Fritz rallies past Harris after dropping first set

• Pegula extends streak of US Open consistency

• Navarro eases by McNally in all-American clash

Taylor Fritz overcame a jittery start, Jessica Pegula extended her run of consistency and Emma Navarro continued to build on last year's breakout season as all three Americans advanced to the third round of the US Open with convincing victories on Wednesday.

On a breezy afternoon at Flushing Meadows, Fritz recovered from a sluggish opening set to defeat South Africa's Lloyd Harris 4-6, 7-6 (3), 6-2, 6-4. The fourth seed, runner-up here last year, was forced to navigate a tricky test against the big-serving Harris, who has been rebuilding his career after injuries saw his ranking plummet outside the world's top 300.