孙杨曾一度看起来无法打破Hackett的世界纪录，因为他在分段世界纪录当中始终没能达到破纪录的标准，但是在最后300米的时候大家发现孙杨的速度明显加快，最终达到世界纪录的水平。

Sun had looked unlikely to break Hackett's record as he was slipping consistently outside the world record split times until the final 300 metres when he noticeably accelerated his pace.