The British women in action on day two of the US Open had contrasting results, Anne Keothavong won just two games against sixth seed Angelique Kerber but Johanna Konta saw off Timea Babos for her first win at a grand slam.
It was a tough draw for Keothavong against a player who has rocketed up the rankings in the last year and Kerber proved far too strong, winning 6-2 6-0.
The German was ranked outside the top 100 last summer before a surprise run to the semi-finals at Flushing Meadows, and she has not looked back, winning two titles this year and reaching the last four at Wimbledon.
Keothavong began brightly, trading well with her opponent off the ground, and she even had a break point in the first game, which Kerber saved.
The British number two held serve twice but, once she dropped serve for the first time in the sixth game with a poor drop shot, the floodgates opened.
Kerber did not lose another game, racing through in just 54 minutes to set up a second round meeting with the unseeded Venus Williams.
Keothavong, 28, has now lost seven straight matches since reaching the second round of Wimbledon in June.
"It's not easy losing all the time but I still enjoy what I do and want to keep going," she said. "I don't cry myself to sleep every night, that's for sure. I will never have this time again."
Konta, the British number five who came through three matches in qualifying to make the main draw, showed plenty of resilience during her 6-2 7-5 success over world number 59 Babos.
The scoreline only told half the story, with Konta, who will climb considerably from her current ranking of 203, winning the final six games of the match and saving 10 set points in the ninth game of the second set.
In the opening set she had been much the better player against an out-of-sorts Babos and then showed her fighting spirit to win in an hour and 48 minutes in stifling conditions.
Konta, who has Hungarian parents, already looks a very valuable addition to the British ranks having switched allegiance in May from Australia, the land of her birth, to the country where she has lived for the last seven years.
Her victory made it three British players into the second round after day one wins for Andy Murray and Laura Robson, while Heather Watson and Keothavong both lost to top-10 players.
Konta will play either 29th seed Tamira Paszek or Olga Govortsova in the second round.