| Country (sports) |  Chile |
|---|---|
| Residence | Santiago, Chile |
| Born | 6 June 1944 Llolleo, Chile |
| Height | 1.80 m (5 ft 11 in) |
| Retired | 1983 |
| Plays | Right-handed (one-handed backhand) |
| Singles | |
| Career record | 104–184 |
| Career titles | 0 |
| Highest ranking | No. 65 (4 September 1974) |
| Grand Slam singles results | |
| French Open | QF (1974) |
| Wimbledon | 2R (1967) |
| US Open | 3R (1972) |
| Doubles | |
| Career record | 227–165 |
| Career titles | 8 |
| Grand Slam doubles results | |
| French Open | F (1972) |
| Wimbledon | SF (1972) |
| US Open | F (1974) |
| Mixed doubles | |
| Career record | 10–7 |
| Career titles | 0 |
| Grand Slam mixed doubles results | |
| French Open | QF (1975) |
| Wimbledon | QF (1972) |
| US Open | 2R (1970, 1972) |
| Team competitions | |
| Davis Cup | F (1976) |
Patricio Cornejo Seckel (Spanish pronunciation: [paˈtɾisjo koɾˈnexo]; born 6 June 1944) is a retired Chilean professional tennis player of the 1970s. He competed at the 1975 Davis Cup with Jaime Fillol and played the longest Davis Cup rubber in terms of games, eventually losing to Stan Smith/Erik van Dillen from the US team 9–7, 39–37, 6–8, 1–6, 3–6 in the 1973 American Zone Final. The second set is the world record for the most games in a Davis Cup set.
Cornejo retired from professional tennis in 1983 but still continues to play socially and in charity tournaments.