TOP seed Michael Chang awoke from a first-set slumber to beat German qualifier Alex Radulescu 5-7, 6-3, 6-1 and advance to the quarter-finals of the US$328,000 Salem Hong Kong Open at Victoria Park yesterday. Chang was joined in the last eight by third-seeded American Jim Courier, who beat his compatriot Jonathan Stark 7-5, 6-1. But the Czech Republic's Martin Damm, seeded eighth, and Dutchman Jan Siemerink became the first seeds to be knocked out. Damm was beaten 6-7 (1-7), 6-3, 6-3 by Sweden's Jan Apell while seventh-seeded Siemerink went down 6-4, 2-6, 7-6 (7-4) to Denmark's Kenneth Carlsen, who now meets Chang. Russian sixth-seed Alexander Volkov had a marathon battle with American wild card entry Tommy Ho before winning 5-7, 7-5, 6-4 to set up a meeting with Courier. Chang looked out of sorts in the first set against Radulescu, losing his serve in the 11th game as he dropped a set in Hong Kong for the first time since 1993. But the 23-year-old defending champion recovered in the second set on a queue from his previously silent fans, displaying his speed and agility, as well as an array of impressive baseline shots, to wrest control of the match. He broke Radulescu to go 5-3 up in the second set and was never troubled again in the match, breaking three times in the final set to win in one hour and 38 minutes. 'I kind of got off to a slow start,' said world number eight Chang. 'I did not know much about Alex before the match, and I should have really figured out his game earlier on. 'It does not normally take me one set to figure out my opponent's style and this is a good message for me because you can't afford to do that against players of this calibre. 'After the first set, I was trying to step up the pace a little bit. I wanted to force things and not be so patient from the back. After the first game of the second set, I felt pretty comfortable.' Radulescu, ranked 243 in the world, had to qualify for the main draw and then beat fellow German Joern Renzenbrink to reach the second round. Chang is now looking forward to his quarter-final clash with the 84th-ranked Carlsen, who he defeated in three sets in the second round of the Japan Open last week. 'It was a tough match in Japan and I'm sure it will be tougher this time,' said Chang. 'He played some good tennis and has a good all-round game. I'm sure he is eager to play me.' Courier also had his work cut out for him in the first set against Stark. Courier and Stark traded early breaks, but from 2-2, it was a hard slog for both players. The 1993 Hong Kong champion Courier eventually took the crucial advantage in the 12th game when he converted the first of two break points. Twice before in the set, he held a double break-point advantage over Stark, who each time was able to wriggle his way out of trouble. The first set took 64 minutes. But Courier was determined to finish off the match, breaking Stark twice in the second set to advance to the quarter-finals. The second round match between South African second seed Wayne Ferreira and American Jeff Tarango was postponed last night because of rain. ORDER OF PLAY Centre Court: 12.30 pm - Jeff Tarango v Wayne Ferreira. Not before: 2 pm - Jonas Bjorkman v Thomas Enqvist. Followed by: Jim Courier v Alexander Volkov. Not before: 6.30 pm - Michael Chang v Kenneth Carlsen. Not before: 8 pm - Jan Apell v Tarango or Ferreira.