11‑Jun‑1965 | Davis Cup EUR QF: TCH vs ITA | Clay | RR | | | Milan Holecek [CZE] d. Merlo | 6-4 5-7 8-6 6-1 | | | | | | | | | |
11‑Jun‑1965 | Davis Cup EUR QF: TCH vs ITA | Clay | RR | | | Jiri Javorsky [TCH] d. Merlo | 1-6 6-4 8-6 6-3 | | | | | | | | | |
14‑May‑1965 | Davis Cup EUR R2: ITA vs BRA | Clay | RR | | | Merlo d. Thomaz Koch [BRA] | 6-4 6-2 6-4 | | | | | | | | | |
14‑May‑1965 | Davis Cup EUR R2: ITA vs BRA | Clay | RR | | | Ronnie Barnes [BRA] d. Merlo | 6-4 9-7 2-6 6-3 | | | | | | | | | |
15‑May‑1964 | Davis Cup EUR R2: ITA vs RHO | Clay | RR | | | Merlo d. Frank Saloman [RHO] | 6-2 0-6 7-5 4-6 7-5 | | | | | | | | | |
15‑May‑1964 | Davis Cup EUR R2: ITA vs RHO | Clay | RR | | | Merlo d. Adrian Bey [RHO] | 6-2 6-3 6-2 | | | | | | | | | |
21‑Jul‑1961 | Davis Cup EUR SF: FRA vs ITA | Clay | RR | | | Jacques Renavand [FRA] d. Merlo | 6-3 0-6 4-6 7-5 6-3 | | | | | | | | | |
10‑Jul‑1959 | Davis Cup EUR SF: ITA vs FRA | Clay | RR | | | Gerard Pilet [FRA] d. Merlo | 6-1 4-6 6-3 6-4 | | | | | | | | | |
12‑Jun‑1959 | Davis Cup EUR QF: ITA vs RSA | Clay | RR | | | Merlo d. Ian Vermaak [RSA] | 6-4 6-2 6-4 | | | | | | | | | |
6‑Dec‑1958 | Davis Cup WG SF: PHI vs ITA | Grass | RR | | | Merlo d. Juan Maria Jose [PHI] | 6-2 7-5 6-1 | | | | | | | | | |
2‑Aug‑1957 | Davis Cup EUR F: BEL vs ITA | | RR | | | Philippe Washer [BEL] d. Merlo | 6-2 8-6 6-2 | | | | | | | | | |
2‑Aug‑1957 | Davis Cup EUR F: BEL vs ITA | | RR | | | Jackie Brichant [BEL] d. Merlo | 6-8 7-5 6-8 7-5 6-1 | | | | | | | | | |
19‑Jul‑1957 | Davis Cup EUR SF: ITA vs SWE | Clay | RR | | | Merlo d. Ulf Schmidt [SWE] | 6-0 6-0 6-3 | | | | | | | | | |
7‑Jun‑1957 | Davis Cup EUR QF: ITA vs POL | Clay | RR | | | Merlo d. Andrzej Licis [POL] | 6-1 6-4 6-0 | | | | | | | | | |
18‑May‑1957 | Davis Cup EUR R2: NED vs ITA | Clay | RR | | | Merlo d. Fred Dehnert [NED] | 6-2 6-1 6-1 | | | | | | | | | |
18‑May‑1957 | Davis Cup EUR R2: NED vs ITA | Clay | RR | | | Merlo d. Hans Van Dalsum [NED] | 6-8 6-2 10-8 6-3 | | | | | | | | | |
20‑Jul‑1956 | Davis Cup EUR F: SWE vs ITA | Clay | RR | | | Merlo d. Ulf Schmidt [SWE] | 5-7 6-2 7-5 6-1 | | | | | | | | | |
15‑Jun‑1956 | Davis Cup EUR SF: FRA vs ITA | Clay | RR | | | Paul Remy [FRA] d. Merlo | 7-5 6-8 6-2 6-2 | | | | | | | | | |
15‑Jun‑1956 | Davis Cup EUR SF: FRA vs ITA | Clay | RR | | | Merlo d. Pierre Darmon [FRA] | 6-3 4-6 9-7 6-4 | | | | | | | | | |
2‑Jun‑1956 | Davis Cup EUR QF: ITA vs DEN | Clay | RR | | | Kurt Nielsen [DEN] d. Merlo | 9-7 1-6 6-3 6-4 | | | | | | | | | |
2‑Jun‑1956 | Davis Cup EUR QF: ITA vs DEN | Clay | RR | | | Merlo d. Torben Ulrich [DEN] | 6-0 6-4 6-2 | | | | | | | | | |
12‑May‑1956 | Davis Cup EUR R2: POL vs ITA | | RR | | | Merlo d. Wladyslaw Skonecki [POL] | 6-0 6-2 6-3 | | | | | | | | | |
12‑May‑1956 | Davis Cup EUR R2: POL vs ITA | | RR | | | Merlo d. Andrzej Licis [POL] | 6-3 6-3 7-5 | | | | | | | | | |
29‑Jul‑1955 | Davis Cup EUR F: ITA vs SWE | Clay | RR | | | Merlo d. Lennart Bergelin [SWE] | 6-1 6-8 6-8 8-6 6-1 | | | | | | | | | |
10‑Jun‑1955 | Davis Cup EUR QF: DEN vs ITA | Clay | RR | | | Merlo d. Torben Ulrich [DEN] | 6-3 6-4 3-6 6-0 | | | | | | | | | |
10‑Jun‑1955 | Davis Cup EUR QF: DEN vs ITA | Clay | RR | | | Merlo d. Kurt Nielsen [DEN] | 6-0 4-6 6-2 4-6 7-5 | | | | | | | | | |
14‑May‑1955 | Davis Cup EUR R2: GER vs ITA | | RR | | | Merlo d. Rupert Huber [GER] | 6-2 6-3 6-3 | | | | | | | | | |
14‑May‑1955 | Davis Cup EUR R2: GER vs ITA | | RR | | | Merlo d. Christoph Biederlack [GER] | 6-1 8-6 6-1 | | | | | | | | | |
10‑Jul‑1953 | Davis Cup EUR SF: BEL vs ITA | | RR | | | Merlo d. Jackie Brichant [BEL] | 4-6 6-1 4-6 6-4 10-8 | | | | | | | | | |
10‑Jul‑1953 | Davis Cup EUR SF: BEL vs ITA | | RR | | | Philippe Washer [BEL] d. Merlo | 6-2 6-2 6-4 | | | | | | | | | |
12‑Jun‑1953 | Davis Cup EUR QF: ITA vs SWE | Clay | RR | | | Merlo d. Sven Davidson [SWE] | 4-6 6-3 6-3 7-5 | | | | | | | | | |
12‑Jun‑1953 | Davis Cup EUR QF: ITA vs SWE | Clay | RR | | | Merlo d. Staffan Stockenberg [SWE] | 6-4 6-0 6-2 | | | | | | | | | |
14‑May‑1953 | Davis Cup EUR R2: NED vs ITA | Clay | RR | | | Merlo d. Hubert Wilton [NED] | 6-3 6-2 6-1 | | | | | | | | | |
14‑May‑1953 | Davis Cup EUR R2: NED vs ITA | Clay | RR | | | Merlo d. Hans Van Swol [NED] | 0-6 2-6 7-5 6-4 7-5 | | | | | | | | | |
17‑Jun‑1951 | Davis Cup EUR QF: ITA vs POL | Clay | RR | | | Merlo d. Jan Radzio [POL] | 6-1 6-1 6-2 | | | | | | | | | |