According to a report from ESPN, a bettor at a sports book in Las Vegas decided it was a good idea to risk $8,500 on tennis legend Novak Djokovic at -8,500 odds to get past Denis Istomin in the second round of the Australian Open. A Djokovic victory would have netted the gambler just $100. Istomin was a huge underdog versus the man who has won 12 grand slam singles titles and is considered one of the best in the game’s history. Istomin was ranked no. 117 in the world (Djokovic was no. 1), and ended up winning 7-6 (10-8) 5-7 2-6 7-6 (7-5) 6-4.