Claudio Mezzadri (Italian pronunciation: [klaudjo metˈtsadri]; born 10 June 1965) is a retired professional tennis player from Switzerland. Mezzadri turned professional in 1983, and won his only ATP singles title four years later in Geneva. He also won four doubles titles in his career. His highest ranking was world No. 26 in singles in November 1987 and No. 23 in doubles in February 1988.

Mezzadri participated in nine Davis Cup ties for Switzerland from 1987 to 1991, posting an 11–4 record in singles and a 3–2 record in doubles.

Result	W/L	Date	Tournament	Surface	Opponent	Score
Win	1–0	Sep 1987	Geneva, Switzerland	Clay	Tomáš Šmíd	6–4, 7–5
Loss	1–1	May 1992	Charlotte, U.S.	Clay	MaliVai Washington	3–6, 3–6

Result	W/L	Date	Tournament	Surface	Partner	Opponents	Score
Loss	0–1	Oct 1986	Palermo, Italy	Clay	Gianni Ocleppo	Paolo Canè Simone Colombo	5–7, 3–6
Win	1–1	Mar 1987	Nancy, France	Carpet	Ramesh Krishnan	Grant Connell Larry Scott	6–4, 6–4
Loss	1–2	Apr 1987	Nice, France	Clay	Gianni Ocleppo	Sergio Casal Emilio Sánchez	3–6, 3–6
Loss	1–3	May 1987	Hamburg, West Germany	Clay	Jim Pugh	Miloslav Mečíř Tomáš Šmíd	6–4, 6–7, 2–6
Win	2–3	Nov 1987	Paris, France	Carpet	Jakob Hlasek	Scott Davis David Pate	7–6, 6–2
Loss	2–4	Sep 1988	Barcelona, Spain	Clay	Diego Pérez	Sergio Casal Emilio Sánchez	6–2, 4–6, 7–9
Win	3–4	Jun 1989	Bari, Italy	Clay	Simone Colombo	Sergio Casal Javier Sánchez	0–6, 6–3, 6–3
Win	4–4	Aug 1989	San Marino	Clay	Simone Colombo	Pablo Albano Gustavo Luza	6–4, 6–1
Loss	4–4	Oct 1989	Basel, Switzerland	Carpet	Omar Camporese	Udo Riglewski Michael Stich	3–6, 6–4, 0–6

• Claudio Mezzadri at the Association of Tennis Professionals
• Claudio Mezzadri at the International Tennis Federation
• Claudio Mezzadri at the Davis Cup