With three medals of any color at the London Olympics, Michael Phelps will become the most decorated Olympian of all time.

The 27-year-old American swimmer amassed six gold medals in the 2004 Athens Olympics, and another eight in Beijing, but this time around the competition is a lot tougher.

In the last Games of his stellar career, Phelps is expecting an emotionally draining week as he competes for seven medals.

Source: SNTV

Editor: Yao Yuzhi (Intern)

Voiceover: Chris Clark

Producer: Flora Yue