JOHANNESBURG, South Africa (AP) _ David Frost stretched his lead to two shots by firing a 5-under-par 65 Saturday in the third round of the Lexington PGA tournament. Frost, a South African, has a 54-hole score of 196.

Zimbabwean Nick Price held to second place with his third straight 66. Ernie Els was third at 201.

American Tripp Isenhour had a 206 after a third-round 70 and was the top American in a field dominated by players from South Africa and Zimbabwe. Isenhour was in seventh place.

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BANGKOK, Thailand (AP) - Laura Davies of Britain won the Kosaido Asahi Thailand Ladies Open on Satuday with a 206 total for the 45 holes. Davies closed with a 6-under par 66 on the 6,531-yard course at the Thana City Golf and Country Club in Samut Prakahn, a Bangkok suburb.

In second place at 213 was Australian Mardi Lunn.

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JAKARTA, Indonesia (AP) - Michael Chang successfully defended his title at the Indonesian Open Saturday by beating David Rikl of the Czech Republic 6-3, 6-3.

Chang broke the left-handed Rikl's serve in the ninth game of the second set with a volley and an overhead smash to the right, leaving Rikl out of position.

Chang won the tournament last year by beating Carl-Uwe Steeb of Germany.

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LIBEREC, Czech Republic (AP) - Espen Bredessen of Norway won his fourth World Cup ski jumping event of this season Saturday and widened his commanding lead in World Cup standings.

Bredesen, winner of the Four Hills tournament earlier this month, had jumps of 121.5 and 125.5 meters for a winning total of 248.60 points. He leads the World Cup standings with 780 points, ahead of German Jens Weissflog with 610 points. Weissflog passed up the competition.

Second at Liberec was Czech Jaroslav Sakala with 117.50 and 123.5 meters and 232.40 points, beating Italian Robert Cecon,

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DAVOS, Switzerland (AP) - Russian speed skater Sergei Klevshenya won World Cup races at 500 and 1,000 meters Saturday.

Dan Jansen, the favorite for the gold medal at next month's Winter Olympics, missed the meet.

Klevshenya, a day after winning the first 500 race at Davos, was time in 37.48 seconds, beating Grunde Njos of Norway by .40. Liu Hong-Bo of China was third.

Klevshenya later won the 1,000 in 1:17.16 minutes, leaving Norway's Adne Sondral .45 behind. Igor Zhelesovski of Belarus was third.

Olympic champion Gunda Niemann of Germany won the women's 3,000. ahead of Svetlana Bazhanova of Russia.

Former world champion Angela Hauck of Germany beat two Russians in the women's 1,000. Hauck won in 1:24.69 minutes, with Oksana Ravilova .64 off the pace and Natalia Polozkova another .11 behind.

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MEXICO CITY (AP) - Francesco Moser of Italy failed Saturday to regain the 1-hour world speed cycling record on a track, finishing in 51 kilometers, 840 meters.

But the 43-year-old cyclist bettered his former record of 51 kilometers 151 meters set in 1984, a mark broken last July when Chris Boardman of Britain sped 52 kilometers, 270 meters in the hour.

The speed test was held in the Mexican Olympic Velodrome before a largely Italian crowd. Afterward Moser said he was pleased with his personal best even if it wasn't enough to set a new world record.