Yulis Gabriel Mercedes Reyes (born November 12, 1979, in Monte Plata, Monte Plata Province) is a Dominican taekwondo practitioner and Olympic medalist. He won a silver medal in the – 58 kg class at the 2008 Summer Olympics in Beijing, after tying with Guillermo Pérez of Mexico, but losing by a judge's decision. He carried the flag for his delegation at the 2012 Summer Olympics in London. He was favored to win his county's third medal at these games. He competed in the Men's 58 kg (flyweight). He lasted one round and a half. A bad move shattered the meniscus and the anterior cruciate ligament in his right knee. He kept fighting with evident pain, before he limped away in tears.