Switzerland's world number one Martina Hingis is through to the third round at the US Open in New York after dispatching Russia's Lina Krasnoroutskaya with a speedy 6-0, 6-2 victory.
Hingis needed just 37 minutes to win the match, breaking her opponent's serve on five occasions and only losing 21 points during their encounter.
The 20-year-old, who is seeking her first Grand Slam win since the Australian Open in January 1999, will now play Croatia's Iva Majoli in the third round.
But Swiss number two Patty Schnyder is out of the tournament after a hard-fought second round match against Belgium's number six seed, Justine Henin.
Playing one of the tournament favourites, Schnyder took the first set 7-6 on a tiebreak, capitalising on Henin's nervousness as the Belgian produced 40 unforced errors and six double faults.
However Schnyder found herself up against it in the second set as Henin, the runner-up at this year's Wimbledon, regained her composure, with the Swiss losing 1-6.
Schnyder rallied again in the third set but needed treatment for a thigh injury with the score at 1-2. Schnyder eventually lost the set 4-6.
There was better news for Switzerland's Miroslava Vavrinec who made it through to the third round at Flushing Meadow for the first time.
Vavrinec defeated Belarus' Tatiana Poutchek 7-5, 4-6, 6-2 and will now get the chance to avenge Schnyder's defeat when she comes up against Henin in the third round.
In the men's draw qualifier Ivo Heuberger completed a mixed day for the Swiss, losing in straight sets to Jiri Novak. The winner of this year's Gstaad Swiss Open tournament brushed Heuberger aside 6-2, 6-3, 6-4.
swissinfo with agencies