- Horton and Sun have had a longstanding feud dating back to 2016 during the Rio Olympics
- Horton is understood to have accused his rival of doping, with the Aussie bringing the antagonism to light once again on Sunday, July 21
- The 23-year-old declined to join the Chinese swimmer on the podium after finishing second in a swimming event hosted in South Korea
Australian Olympic champion swimmer Mack Horton has rekindled his beef with Chinese rival Sun Yang.
Sun Yang recorded his fourth consecutive title in the men's 400 free at the world swimming championships in South Korea on Sunday, July 21, to claim the gold medal ahead of Horton who had to settle for silver.
However, the victory was marred with controversies, with Horton refusing to join his opponent on the podium to collect his medal.
Sun, who was trailing four other swimmers worked his way to first to claim a sensational win ahead of Horton who was his greatest challenger.
But Horton would later refuse to share the medal podium with Sun, who is currently staring a possible ban for violating doping protocols.
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The Australian swimmer further declined to shake hands or pose for photos with Sun as he shared a light moment with Italy's Gabriele Detti who claimed the bronze medal.
The pair's feud dates back to 2016 during the Rio Olympics when Horton labelled Sun "a drug cheat," two years after the Chinese serving a doping ban.
At the time, Horton went on to win the gold medal, but has since struggled to outshine Sun who has dominated swimming events in recent years.
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