Question: Who among these has NOT won a gold medal at the Olympics in this sport in singles?
Than answer is Roger Fereder.
Roger Federer is a Swiss professional tennis player. He is ranked No. 5 in the world by the Association of Tennis Professionals (ATP). He has won 20 Grand Slam men’s singles titles, an all-time record shared with Rafael Nadal but can not won gold medal at the Olympics in single.