The men's 100 metre backstroke event at the 2000 Summer Olympics took place on 17–18 September at the Sydney International Aquatic Centre in Sydney, Australia. Lenny Krayzelburg, a Ukrainian-born American whose swimming career began in the old Soviet system, shattered a new Olympic record to claim a gold medal in the event, slashing 0.14 seconds off an eight-year-old standard set by Jeff Rouse in Barcelona. He seized the lead on the first length, and held off a challenge from Australia's overwhelming favorite Matt Welsh down the final lap to touch the wall first in 53.72. Delighted by the frenzied home crowd, Welsh took home with a silver medal in an Oceanian record of 54.07. Meanwhile, Germany's Stev Theloke stormed home from behind to wrest a bronze in 54.82, edging out another Aussie Jo