Gustavo Fernández (born 20 January 1994) is an Argentine professional wheelchair tennis player. Fernández has been ranked as the world No. 1 in men's singles.
Fernández has won major singles titles at the 2016 French Open, the 2017 Australian Open, the 2019 Australian Open, the 2019 French Open, and the 2019 Wimbledon Championships. In doubles, he has won major titles at the 2015 Wimbledon Championships partnering Nicolas Peifer, and the 2019 French Open and 2022 Wimbledon Championships partnering Shingo Kunieda.