Yulis Gabriel Mercedes Reyes (born November 12, 1979 in Monte Plata, Monte Plata) 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).