Britain's Heather Watson suffered a bitterly disappointing exit at the Australian Open, losing 6-1 6-0 to Victoria Azarenka in the first round.
The 17-year-old from Guernsey won the opening game of the match but was completely outclassed thereafter as third seed Azarenka won in 67 minutes.
Watson's compatriot James Ward lost 6-4 6-3 6-4 to Blaz Kavcic of Slovenia.
Elena Baltacha, Anne Keothavong and Laura Robson play on Monday, while Andy Murray faces Ryan Harrison on Tuesday.
A disappointing day for Watson, who can play much better. The start was decent, winning the first game and having a break point in the second, but after that it was total one-way traffic. She wasn't moving at her best and, for whatever reason, didn't seem to have as much confidence as she did during the Sharapova match in New York. Azarenka is going to be tough to beat here
Britain had six singles players in the main draw of a foreign Grand Slam for the first time since 1992.
But that quickly became five when Watson, sporting a heavily-strapped left ankle, was dispatched by Azarenka in the first match on a sweltering Rod Laver Arena.
Watson lost their only previous match 6-1 6-1 and it was a similar story as Azarenka set up a second-round meeting with Australian wildcard Casey Dellacqua.
The world number three looked nervous in the early stages - saving a break point in her opening service game - but soon asserted her authority.
Watson's serve deserted her in game three as two double-faults, a poor drop shot and a long forehand handed Azarenka the first break.
Azarenka, 22, then produced a superb crosscourt backhand pass and placed a forehand winner on the line to move 4-1 ahead.
Watson appeared to be struggling with the heat and could not hide her frustration after floating a backhand long to concede the 36-minute first set.
The 105th-ranked right-hander began the second brightly but her day took another turn for the worse with a missed backhand to fall 2-0 behind.
As Watson struggled badly to land her first serve and Azarenka found the corners at will, it was no surprise to see the Wimbledon semi-finalist secure the double-break.
And she sealed the match when Watson netted a backhand for her 27th unforced error.
Ward, meanwhile, was seen off in two hours and 17 minutes as Kavcic secured a meeting with Juan Martin del Potro or Adrian Mannarino in round two.
The 24-year-old Londoner, ranked 161st, came through qualifying to reach the main draw of a Grand Slam by right for the first time.
But he provided little resistance for world number 103 Kavcic, finishing with a first-serve percentage of 47%
