| WCT Challenge Cup | |
|---|---|
| Defunct tennis tournament | |
| Tour | World Championship Tennis |
| Founded | 1976 |
| Abolished | 1980 |
| Editions | 5 |
| Location | Honolulu, Hawaii (1976) Las Vegas, Nevada (1977) Montego Bay, Jamaica (1978) Montreal, Quebec, Canada (1979–80) |
| Surface | Hard / outdoors (1976, 1978) Carpet / indoors (1977, 1979–80) |
The WCT Challenge Cup was a men's tennis tournament held from 1976 until 1980 that was part of the World Championship Tennis circuit. It was played on outdoor hard courts in 1976, 1978 and indoor carpet courts in 1977 and 1979–80, The tournament was played in Honolulu, Hawaii in 1976, Las Vegas, Nevada in 1977, Montego Bay, Jamaica in 1978, and Montreal, Quebec, Canada from 1979–1980. The tournament featured a field of four or eight players.
| Location | Year | Champions | Runners-up | Score |
|---|---|---|---|---|
| Honolulu | 1976 |  Ilie Năstase |
 Arthur Ashe |
6–3, 1–6, 6–7, 6–3, 6–1 |
| Las Vegas | 1977 | Ilie Nastase |
Jimmy Connors |
3–6, 7–6, 6–4, 7–5 |
| Montego Bay | 1978 | Ilie Năstase |
Peter Fleming |
2–6, 5–6, 6–2, 6–4, 6–4 |
| Montreal | 1979 |  Björn Borg |
Jimmy Connors |
6–4, 6–2, 2–6, 6–4 |
| 1980 | John McEnroe |
 Vijay Amritraj |
6–1, 6–2, 6–1 |