Another barrier on China’s path to sports domination fell today when Zheng Jie and Yan Zi became the country’s first tennis Grand Slam winners, upsetting top seeds Lisa Raymond and Samantha Stosur in the Australian Open women’s doubles final. The news was immediately hailed in China as a ‘‘miracle’’. Yan and Zheng, who both won singles tournaments last year and were seeded 12th in the doubles at Melbourne, came from a set down and saved two match points in a second set tie-break before going on to win 2-6 7-6 6-3. ‘‘We feel very excited and very happy’’, Yan told reporters. ‘‘Little bit nervous. Because first time in the centre court. It’s so big and so many people.’’ Yan said the match, which was broadcast in China, would help strengthen the game there, although it was too early to tell if their win would have any impact on the Beijing Olympics. CHINESE CHEER