Daniel Wallace of Scotland competes during the men's 400M individual medley final at the 2014 Glasgow Commonwealth Games held in Glasgow, Scotland on July 25, 2014. Wallace won the gold with a time of 4 minutes and 11.20 seconds. (Xinhua/Han Yan)

Daniel Wallace of Scotland celebrates after winning the men's 400M individual medley final at the 2014 Glasgow Commonwealth Games held in Glasgow, Scotland on July 25, 2014. Wallace won the gold with a time of 4 minutes and 11.20 seconds. (Xinhua/Han Yan)

Daniel Wallace (C) of Scotland, Thomas Fraser-Holmes (R) of Australia and Sebastien Rousseau of South Africa display their medals during the awarding ceremony for the men's 400M individual medley final at the 2014 Glasgow Commonwealth Games held in Glasgow, Scotland on July 25, 2014. Wallace won the gold with a time of 4 minutes and 11.20 seconds. (Xinhua/Han Yan)

Daniel Wallace of Scotland competes during the men's 400M individual medley final at the 2014 Glasgow Commonwealth Games held in Glasgow, Scotland on July 25, 2014. Wallace won the gold with a time of 4 minutes and 11.20 seconds. (Xinhua/Han Yan)

Daniel Wallace of Scotland celebrates after winning the men's 400M individual medley final at the 2014 Glasgow Commonwealth Games held in Glasgow, Scotland on July 25, 2014. Wallace won the gold with a time of 4 minutes and 11.20 seconds. (Xinhua/Han Yan)

Daniel Wallace of Scotland bites the gold medal during the awarding ceremony for the men's 400M individual medley final at the 2014 Glasgow Commonwealth Games held in Glasgow, Scotland on July 25, 2014. Wallace won the gold with a time of 4 minutes and 11.20 seconds. (Xinhua/Han Yan)