Osaka, Keys mount thrilling fightbacks, Gauff, Zverev highlight night session

NEW YORK, Sept 3 : Two-time champion Naomi Osaka overcame mid-match mistakes to progress while Madison Keys saved five match points to keep her campaign alive in the U.S. Open second round on Thursday, as fans eagerly awaited Coco Gauff and Alexander Zverev in the late programme.

A perennial fan favourite in New York, Osaka survived an up-and-down affair against Czech Katerina Siniakova to win 6-2 5-7 6-1, harnessing the mental resolve she has taken years to hone on the court where she claimed her maiden major eight years ago.

"I just told myself that it's an honour to play on this court," Osaka told the crowd at Arthur Ashe Stadium. "I just want to keep playing in front of you guys if possible."

The 28-year-old Japanese player's match was not the only nail-biter across the sprawling Flushing plaza, as American Keys mounted an epic comeback against Hungarian Anna Bondar to win 5-7 6-4 7-6(5) to delight the home fans on the outer courts.

The 2017 finalist sent over a remarkable 34 forehand winners to get the job done and gave all credit to her adoring fans after forcing Bondar into an error at the net on match point.

"That was something, huh?" Keys, 31, told the crowd after the win. "No stress though - we all knew I had it, right?"

Her compatriot Taylor Fritz had a far easier time, swatting aside Italian Mattia Bellucci 6-0 6-1 6-1, while Amanda Anisimova's 6-3 3-6 6-1 defeat of Austrian Lilli Tagger added to the American joy.

Canadian third seed Felix Auger-Aliassime, a semi-finalist last year, took the first set but was then swept away in a 6-7(5) 6-3 6-2 6-2 defeat by Russian Karen Khachanov, becoming the highest-seeded man to exit the tournament so far.

The Philippines' wildly popular Alex Eala capped the early programme at