Olympic champion Sun Yang of China won his first title in men`s 200m freestyle at the 17th FINA World Championships in Budapest on Tuesday, while another Chinese swimmer Xu Jiayu claimed the champion of the men`s 100m backstroke, the first ever victory for Chinese male swimmers in the event at worlds.

Placed sixth after the first 100 meters, Sun made a strong comeback to clock 1 minute and 44.39 seconds to record his groundbreaking victory, beating the Asian record of 1:44.47 he set in 2013. It was also his second title in the Hungarian capital after the 400m free.

"I feel happy about the gold medal. Actually I didn`t expect such a result, and just wanted to work on every detail," said Sun after his victory.

Sun claimed the golds in the 400m, 800m and 1500m freestyle before his200m triumph at worlds. He is also the Olympic champion in 200m, 400m and 1500m freestyle.

"I lost the race with a bit pity at World Championships in Kazan two years ago. Today my dream has come true," Sun pointed out.

Townley Haas of the United States and Aleksandr Krasnykh of Russia finished second and third respectively.

Xu, who ranked first in Monday`s heats and semifinals, built his leading position from the start and finished atop the podium with 52.44 seconds, beating his American opponent Matt Grevers, the London Olympic champion, by four hundredths second.

"I didn`t expect to win by such a small margin. The result was not quite up to my expectation, but in the end I won the title," said Xu.

"I felt a little tired in the final part of the race, and did not feel as smooth as in the semifinals, because it had much impact on the podium position," he added.

Xu finished 51.86 seconds in National Championships in April, just one hundredth second shy of the world record set by Ryan Murphy of the United States last year in Rio. Olympic champion Murphy got the bronze medal at 52.59 seconds.

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"I performed quite well in the semifinals, so it was normal for me to have some ideas in my mind. Actually I aimed at rewriting the world record before the matchup.

"This time it could be seen as a surprise, and I lived up to my expectation, while failing to give myself some surprises," Xu pointed out.

Before Xu`s triumph, Chinese swimming star Sun Yang clinched his first gold medal in men`s 200m freestyle at the World Championships.

"I could also stand at the stage center now, just like he did," Xu said confidently.

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