Playing four matches in one day took its toll on Lu Yen-hsun. The Taiwanese player pulled a thigh muscle during a marathon session on court at the US$15,000 Gatorade Hong Kong Futures event on Friday and he paid for it yesterday. Lu was nowhere near his best as he and SAR partner John Hui Kin-yip, the top seeds, were beaten 6-3, 7-6 (7-2) in the men's doubles final by second seeds Fred Hemmes of Holland and Jun Kato of Japan at Victoria Park. Rain delays meant Lu had to play two singles and two doubles matches on Friday and he explained after yesterday's defeat: 'I can't move quickly. I injured my left thigh playing those four matches. My injury put additional pressure on John. We've played together four times and we would have had a good chance if I'd been injury-free.' Hui, 172nd in the ATP doubles rankings, said he was disappointed at not being able to win back-to-back Futures titles in Hong Kong - he won last year's doubles event with Australian Anthony Ross - and his second title with Lu after they triumphed in a Futures in Japan in March. He said: 'We didn't play well in the first set but the second was close. The third set would have been different if we'd won the second. It's also hard for Lu.' Hui and Lu missed a golden chance to get back into the match when, at 5-5 in the second, they blew three break points on Kato's serve. Kato and Hemmes took the game and dominated the eventual tiebreaker. 'When you let chances like that slip away, it's difficult to come back. Our opponents played well, too,' Hui said. Lu, who won the mixed doubles gold for Taiwan at last month's Asian Games, had been hoping to make amends in yesterday's final after losing his singles semi-final on Friday to Japan's Tasuku Iwami. Another Japanese, Takahiro Terachi beat Iwami 7-5, 6-0 in yesterday's singles final. Meanwhile, Hong Kong Tennis Association executive director Peter Hung is praying corporate sponsors will keep supporting the event. He said: 'We hope to stage it next year because our young players get valuable experience by taking part, but we can't do it ourselves without financial backup from commercial companies. We need about $300,000 to stage this event.' Insurance company AIA sponsored last year's event at Sha Tin's Sports Institute.