Juan Avendaño
| Country |
 Spain |
|---|---|
| Residence |
Barcelona, Catalonia, Spain |
| Born |
January 29, 1961 Luanco, Asturias, Spain |
| Height | 177 cm (5 ft 10 in) |
| Turned pro | 1980 |
| Plays | Right-handed (two-handed backhand) |
| Prize money | $216,639 |
| Singles | |
| Career record | 39–75 |
| Career titles | 0 |
| Highest ranking | No. 90 (Nov 22, 1982) |
| Grand Slam Singles results | |
| French Open | 3R (1982) |
| Wimbledon | 1R (1982, 1983, 1987) |
| Doubles | |
| Career record | 12–41 |
| Career titles | 0 |
| Highest ranking | No. 187 (Sep 10, 1984) |
Juan Bautista Avendaño Iglesias (born January 29, 1961 in Luanco, Asturias) is a former professional tennis player from Spain, best remembered for being Spain Davis Cup team captain along Jordi Arrese and Josep Perlas when Spain won its second Davis Cup title, in 2004.