- Lilly King wins duel in the pool
- Sun Yang wins 200m freestyle gold
- America's Murphy triumphs in backstroke
- Hungary's Katinka Hosszu wins second gold
(CNN)It was one of the most anticipated swimming races of the Rio Olympics -- and US star Lilly King backed up her fighting talk by defeating Yulia Efimova to win gold in the 100 meters breaststroke on Monday.