TOKYO—World record holder and defending champion Adam Peaty shaved his moustache but won, as usual, by much more than a whisker as he powered through to the Tokyo Olympics 100m breaststroke final with the fastest time on Sunday. The 26-year-old Briton won his morning semi-final comfortably in 57.63 seconds, slower than the 57.56 in Saturday’s evening heats but more than a second quicker than China’s Yan Zibei. American Michael Andrew was third in that heat, 1.36 off Peaty’s time. Dutch rival Arno Kamminga won the other semi-final in 58.19, also slower than his Saturday time of 57.80 and only 0.09 quicker than Italian Nicolo Martinenghi. Britain’s James Wilby was third in that heat, 0.81 off the pace. “Medals aren’t won in the heats, they’re not won in the semi,” said Peaty, who said he still had something in reserve for Monday’s final. “The Olympics are always about racing. It’s never …