Madison Keys wins marathon match, advances to 3rd round of Olympics. Madison Keys of the United States celebrates defeating France's Kristina Mladenovic in the women's tennis competition at the 2016 Summer Olympics in Rio de Janeiro, Brazil, Monday, Aug. 8, 2016. Madison Keys is determined to stick around in Rio as long as possible. The Rock Island native proved it Monday by toughing out a 7-5, 6-7 (4), 7-6 (5) second-round victory over Kristina Mladenovic of France. The match lasted 3 hours, 14 minutes, which is the longest of these Olympics.