26‑Dec‑1961 | Davis Cup WG CR: AUS vs ITA | Grass | RR | | | Rod Laver [AUS] d. Sirola | 6-1 6-4 6-3 | | | | | | | | | |
26‑Dec‑1961 | Davis Cup WG CR: AUS vs ITA | Grass | RR | | | Roy Emerson [AUS] d. Sirola | 6-3 6-3 4-6 6-2 | | | | | | | | | |
16‑Jun‑1961 | Davis Cup EUR QF: FRG vs ITA | Clay | RR | | | Wilhelm Bungert [GER] d. Sirola | 6-4 6-3 7-5 | | | | | | | | | |
16‑Jun‑1961 | Davis Cup EUR QF: FRG vs ITA | Clay | RR | | | Christian Kuhnke [GER] d. Sirola | 9-7 6-3 3-6 11-9 | | | | | | | | | |
2‑Jun‑1961 | Davis Cup EUR R2: BEL vs ITA | Clay | RR | | | Sirola d. Eric Drossart [BEL] | 2-6 6-4 7-5 6-2 | | | | | | | | | |
2‑Jun‑1961 | Davis Cup EUR R2: BEL vs ITA | Clay | RR | | | Jackie Brichant [BEL] d. Sirola | 6-1 7-5 6-0 | | | | | | | | | |
26‑Dec‑1960 | Davis Cup WG CR: AUS vs ITA | Grass | RR | | | Neale Fraser [AUS] d. Sirola | 4-6 6-3 6-3 6-3 | | | | | | | | | |
26‑Dec‑1960 | Davis Cup WG CR: AUS vs ITA | Grass | RR | | | Rod Laver [AUS] d. Sirola | 9-7 6-2 6-3 | | | | | | | | | |
9‑Dec‑1960 | Davis Cup EUR F: ITA vs USA | Grass | RR | | | Earl Butch Buchholz [USA] d. Sirola | 6-8 7-5 11-9 6-2 | | | | | | | | | |
9‑Dec‑1960 | Davis Cup EUR F: ITA vs USA | Grass | RR | | | Sirola d. Barry Mackay [USA] | 9-7 6-3 8-6 | | | | | | | | | |
29‑Jul‑1960 | Davis Cup EUR F: SWE vs ITA | Clay | RR | | | Jan Erik Lundquist [SWE] d. Sirola | 6-4 4-6 6-3 6-3 | | | | | | | | | |
29‑Jul‑1960 | Davis Cup EUR F: SWE vs ITA | Clay | RR | | | Sirola d. Ulf Schmidt [SWE] | 6-4 6-2 6-1 | | | | | | | | | |
15‑Jul‑1960 | Davis Cup EUR SF: GBR vs ITA | Grass | RR | | | Sirola d. Michael Davies [GBR] | 9-7 7-5 1-6 2-6 6-4 | | | | | | | | | |
10‑Jun‑1960 | Davis Cup EUR QF: ITA vs CHI | Clay | RR | | | Luis Ayala [CHI] d. Sirola | 6-4 3-6 6-3 6-2 | | | | | | | | | |
10‑Jun‑1960 | Davis Cup EUR QF: ITA vs CHI | Clay | RR | | | Sirola d. Patricio Rodriguez Chi [CHI] | 6-0 7-5 6-3 | | | | | | | | | |
13‑May‑1960 | Davis Cup EUR R2: HUN vs ITA | | RR | | | Andras Adam Stolpa [HUN] d. Sirola | 6-2 2-6 6-8 6-2 6-1 | | | | | | | | | |
7‑Aug‑1959 | Davis Cup EUR SF: AUS vs ITA | Grass | RR | | | Neale Fraser [AUS] d. Sirola | 19-17 1-6 6-3 6-4 | | | | | | | | | |
7‑Aug‑1959 | Davis Cup EUR SF: AUS vs ITA | Grass | RR | | | Rod Laver [AUS] d. Sirola | 4-6 6-4 6-0 6-3 | | | | | | | | | |
24‑Jul‑1959 | Davis Cup EUR F: ITA vs ESP | Clay | RR | | | Sirola d. Juan Manuel Couder [ESP] | 2-6 8-6 7-5 2-6 6-4 | | | | | | | | | |
10‑Jul‑1959 | Davis Cup EUR SF: ITA vs FRA | Clay | RR | | | Sirola d. Pierre Darmon [FRA] | 6-1 6-1 3-6 8-6 | | | | | | | | | |
12‑Jun‑1959 | Davis Cup EUR QF: ITA vs RSA | Clay | RR | | | Sirola d. Ian Vermaak [RSA] | 6-4 6-3 6-4 | | | | | | | | | |
12‑Jun‑1959 | Davis Cup EUR QF: ITA vs RSA | Clay | RR | | | Abe Segal [RSA] d. Sirola | 6-3 10-8 4-6 6-4 | | | | | | | | | |
16‑May‑1959 | Davis Cup EUR R2: BEL vs ITA | | RR | | | Sirola d. Jean Pierre Froment [BEL] | 6-2 6-2 6-3 | | | | | | | | | |
16‑May‑1959 | Davis Cup EUR R2: BEL vs ITA | | RR | | | Jackie Brichant [BEL] d. Sirola | 5-7 6-3 7-5 10-12 7-5 | | | | | | | | | |
19‑Dec‑1958 | Davis Cup EUR F: USA vs ITA | Grass | RR | | | Hamilton Richardson [USA] d. Sirola | 6-4 6-2 7-5 | | | | | | | | | |
19‑Dec‑1958 | Davis Cup EUR F: USA vs ITA | Grass | RR | | | Alejandro Olmedo [PER] d. Sirola | 20-18 6-1 6-4 | | | | | | | | | |
6‑Dec‑1958 | Davis Cup WG SF: PHI vs ITA | Grass | RR | | | Sirola d. Raymundo Deyro [PHI] | 8-6 6-3 6-4 | | | | | | | | | |
1‑Aug‑1958 | Davis Cup EUR F: ITA vs GBR | Clay | RR | | | Sirola d. Billy Knight [GBR] | 6-3 7-5 6-3 | | | | | | | | | |
1‑Aug‑1958 | Davis Cup EUR F: ITA vs GBR | Clay | RR | | | Sirola d. Michael Davies [GBR] | 6-3 6-2 6-2 | | | | | | | | | |
18‑Jul‑1958 | Davis Cup EUR SF: POL vs ITA | | RR | | | Sirola d. Andrzej Licis [POL] | 6-4 3-6 6-4 6-3 | | | | | | | | | |
18‑Jul‑1958 | Davis Cup EUR SF: POL vs ITA | | RR | | | Sirola d. Wladyslaw Skonecki [POL] | 1-6 3-6 6-0 6-2 6-2 | | | | | | | | | |
5‑Jun‑1958 | Davis Cup EUR QF: DEN vs ITA | Clay | RR | | | Sirola d. Kurt Nielsen [DEN] | 6-2 4-6 7-5 12-14 7-5 | | | | | | | | | |
5‑Jun‑1958 | Davis Cup EUR QF: DEN vs ITA | Clay | RR | | | Sirola d. Torben Ulrich [DEN] | 6-8 6-3 6-4 3-6 6-3 | | | | | | | | | |
15‑May‑1958 | Davis Cup EUR R2: ITA vs IND | Clay | RR | | | Sirola d. Ramanathan Krishnan [IND] | 2-6 7-5 6-3 6-3 | | | | | | | | | |
15‑May‑1958 | Davis Cup EUR R2: ITA vs IND | Clay | RR | | | Naresh Kumar [IND] d. Sirola | 5-7 7-5 3-6 6-4 6-4 | | | | | | | | | |
7‑Jun‑1957 | Davis Cup EUR QF: ITA vs POL | Clay | RR | | | Andrzej Licis [POL] d. Sirola | 6-4 9-7 6-0 | | | | | | | | | |
18‑May‑1957 | Davis Cup EUR R2: NED vs ITA | Clay | RR | | | Sirola d. Fred Dehnert [NED] | 6-4 6-4 9-7 | | | | | | | | | |
29‑Sep‑1956 | Davis Cup EUR SF: USA vs ITA | Grass | RR | | | Vic Seixas [USA] d. Sirola | 6-3 11-9 6-4 | | | | | | | | | |
29‑Sep‑1956 | Davis Cup EUR SF: USA vs ITA | Grass | RR | | | Sammy Giammalva [USA] d. Sirola | 12-10 6-3 6-2 | | | | | | | | | |
20‑Jul‑1956 | Davis Cup EUR F: SWE vs ITA | Clay | RR | | | Sirola d. Torsten Johansson [SWE] | 6-4 1-6 6-2 6-1 | | | | | | | | | |
14‑Aug‑1955 | Davis Cup EUR F: AUS vs ITA | Grass | RR | | | Ken Rosewall [AUS] d. Sirola | 6-4 4-6 6-1 6-4 | | | | | | | | | |
29‑Jul‑1955 | Davis Cup EUR F: ITA vs SWE | Clay | RR | | | Sven Davidson [SWE] d. Sirola | 6-2 8-6 6-4 | | | | | | | | | |
14‑Jul‑1955 | Davis Cup EUR SF: GBR vs ITA | Grass | RR | | | Sirola d. Roger Becker [GBR] | 10-8 6-2 7-5 | | | | | | | | | |
10‑Jun‑1954 | Davis Cup EUR QF: SWE vs ITA | Clay | RR | | | Lennart Bergelin [SWE] d. Sirola | 6-2 6-3 2-6 6-1 | | | | | | | | | |
15‑May‑1954 | Davis Cup EUR R2: ESP vs ITA | Clay | RR | | | Sirola d. Carlos Ferrer [ESP] | 6-1 8-6 7-5 | | | | | | | | | |
15‑May‑1954 | Davis Cup EUR R2: ESP vs ITA | Clay | RR | | | Sirola d. Emilio Martinez Del Rey [ESP] | 6-2 4-6 6-4 6-4 | | | | | | | | | |
12‑Jun‑1953 | Davis Cup EUR QF: ITA vs SWE | Clay | RR | | | Sven Davidson [SWE] d. Sirola | 6-3 3-6 5-7 6-3 6-4 | | | | | | | | | |