Fiorella Bonicelli (born December 21, 1951) is a retired professional tennis player from Uruguay. During her career, she won the 1975 French Open mixed doubles title with Thomaz Koch. She also won the 1976 French Open women's doubles title with Gail Lovera, defeating Kathleen Harter and Helga Niessen Masthoff 6–4, 1–6, 6–3. At the Fed Cup, her singles record is 11–4, and doubles record 6–8. During her career, she reached one Grand Slam singles quarterfinal, at the 1978 French Open, where she lost to Virginia Ruzici 6–7, 6–4, 6–8.