Masters Doubles Championship : Flach and Seguso Advance to Semifinals

Wimbledon champions Ken Flach and Robert Seguso lost their last round-robin match Friday but still advanced to the semifinals of the $200,000 Masters Doubles tennis championship.

Flach and Seguso were the only Americans to reach the round of four in the 16-man competition, despite losing, 6-3, 7-6, 6-1, to countrymen Gary Donnelly and Peter Fleming.

Because of the round-robin format, Flach and Seguso, who are aiming for their 20th career doubles title, already were assured of a semifinal berth before the match.

The Wimbledon titlists will face Spain’s Sergio Casal and Emilio Sanchez in the first semifinal today. The other semifinal will pit Miloslav Mecir and Tomas Smid of Czechoslovakia against defending champions Stefan Edberg and Anders Jarryd of Sweden.

Edberg and Jarryd, needing to take only one set in their final group match against Australians Laurie Warder and Peter Doohan, won, 4-6, 6-3, 6-3, 7-6.

Mecir and Smid, who already have won four doubles titles this year, breezed to their third victory of the competition by beating American Paul Annacone and South African Christo Van Rensburg, 6-2, 6-1, 6-4.

Casal and Sanchez, who lost their opening match in straight sets to Flach and Seguso, bounced back to win their next two, including Friday’s 7-6, 6-4, 7-6 victory over Americans Scott Davis and David Pate.

Annacone and Van Rensburg were swept aside in 1 1/2 hours of relentless pressure as the Czechoslovaks reeled off nine consecutive games from 2-2 in the first set to 5-0 in the second.

Annacone broke the sequence by holding his serve but after Smid had clinched the set, the American was broken midway through the third, and the Czechoslovaks moved smoothly through.