5‑Dec‑1957 | Davis Cup AME SF: USA vs PHI | Grass | RR | | | Vic Seixas [USA] d. Ampon | 6-1 6-1 6-2 | | | | | | | | | |
5‑Dec‑1957 | Davis Cup AME SF: USA vs PHI | Grass | RR | | | Herb Flam [USA] d. Ampon | 6-3 6-2 6-4 | | | | | | | | | |
21‑Nov‑1957 | Adelaide | Grass | R16 | | | Neale Fraser [AUS] d. Ampon | 6-3 6-0 6-2 | | | | | | | | | |
21‑Nov‑1957 | Adelaide | Grass | R32 | | | Ampon d. Trevor Fancutt [RSA] | 6-4 6-4 15-13 | | | | | | | | | |
6‑Nov‑1957 | Sydney | Grass | R16 | | | Ashley Cooper [AUS] d. Ampon | 6-0 6-0 6-0 | | | | | | | | | |
6‑Nov‑1957 | Sydney | Grass | R32 | | | Ampon d. Tony Ryan [AUS] | 8-6 9-7 8-6 | | | | | | | | | |
17‑May‑1957 | Davis Cup AME F: PHI vs JPN | | RR | | | Ampon d. Atsushi Miyagi [JPN] | 3-6 6-4 6-1 6-4 | | | | | | | | | |
17‑May‑1957 | Davis Cup AME F: PHI vs JPN | | RR | | | Ampon d. Kosei Kamo [JPN] | 6-1 4-6 5-7 6-3 6-1 | | | | | | | | | |
26‑Apr‑1957 | Davis Cup EUR SF: PHI vs IND | | RR | | | Ampon d. Naresh Kumar [IND] | 6-2 6-1 6-4 | | | | | | | | | |
14‑Feb‑1957 | Colombo | | QF | | | Jaroslav Drobny [TCH] d. Ampon | 7-9 6-3 6-3 3-6 6-4 | | | | | | | | | |