29‑Apr‑1966 | Davis Cup EUR R1: FRG vs NOR | Clay | RR | | | Wilhelm Bungert [GER] d. Sjowall | 4-6 6-0 6-3 4-6 6-2 | | | | | | | | | |
29‑Apr‑1966 | Davis Cup EUR R1: FRG vs NOR | Clay | RR | | | Ingo Buding [GER] d. Sjowall | 6-0 6-3 6-0 | | | | | | | | | |
14‑May‑1965 | Davis Cup EUR R2: NOR vs RSA | Clay | RR | | | Keith Diepraam [RSA] d. Sjowall | 6-4 6-1 6-4 | | | | | | | | | |
1‑May‑1964 | Davis Cup EUR R1: NOR vs POR | Clay | RR | | | Sjowall d. David Cohen [POR] | 6-4 6-2 6-1 | | | | | | | | | |
1‑May‑1964 | Davis Cup EUR R1: NOR vs POR | Clay | RR | | | Sjowall d. Alfredo Vaz Pinto [POR] | 9-11 8-6 7-5 7-5 | | | | | | | | | |
24‑May‑1963 | Davis Cup EUR R2: DEN vs NOR | Clay | RR | | | Jan Leschly [DEN] d. Sjowall | 6-3 6-2 6-3 | | | | | | | | | |
24‑May‑1963 | Davis Cup EUR R2: DEN vs NOR | Clay | RR | | | Sjowall d. Jorgen Ulrich [DEN] | 6-2 6-2 6-4 | | | | | | | | | |
3‑May‑1963 | Davis Cup EUR R1: POR vs NOR | Clay | RR | | | Sjowall d. Antonio Azevedo Gomes [POR] | 6-3 4-6 6-4 6-3 | | | | | | | | | |
3‑May‑1963 | Davis Cup EUR R1: POR vs NOR | Clay | RR | | | Sjowall d. Alfredo Vaz Pinto [POR] | 6-4 6-4 6-4 | | | | | | | | | |
29‑Apr‑1960 | Davis Cup EUR R1: NOR vs NED | Clay | RR | | | Willem Maris [NED] d. Sjowall | 6-3 6-2 6-4 | | | | | | | | | |
29‑Apr‑1960 | Davis Cup EUR R1: NOR vs NED | Clay | RR | | | Piet Van Eijsden [NED] d. Sjowall | 6-2 4-6 3-6 6-3 6-3 | | | | | | | | | |
1‑May‑1959 | Davis Cup EUR R1: NOR vs RSA | Clay | RR | | | Abe Segal [RSA] d. Sjowall | 6-2 6-1 6-3 | | | | | | | | | |
1‑May‑1959 | Davis Cup EUR R1: NOR vs RSA | Clay | RR | | | Ray Weedon [RSA] d. Sjowall | 7-5 4-6 6-1 6-8 7-5 | | | | | | | | | |
26‑Apr‑1957 | Davis Cup EUR R1: NED vs NOR | Clay | RR | | | Hans Van Dalsum [NED] d. Sjowall | 6-2 4-6 6-2 4-6 6-3 | | | | | | | | | |
11‑May‑1956 | Davis Cup EUR R2: NOR vs SWE | Clay | RR | | | Sven Davidson [SWE] d. Sjowall | 9-7 4-6 6-2 6-3 | | | | | | | | | |
11‑May‑1956 | Davis Cup EUR R2: NOR vs SWE | Clay | RR | | | Ulf Schmidt [SWE] d. Sjowall | 2-6 6-3 6-0 6-2 | | | | | | | | | |
27‑Apr‑1956 | Davis Cup EUR R1: NOR vs ISR | Clay | RR | | | Sjowall d. Eleazar Davidman [ISR] | 6-1 6-2 6-3 | | | | | | | | | |
27‑Apr‑1956 | Davis Cup EUR R1: NOR vs ISR | Clay | RR | | | Sjowall d. Arie Avidan Weiss [ISR] | 6-2 6-0 6-1 | | | | | | | | | |
6‑May‑1955 | Davis Cup EUR R1: NOR vs RSA | Clay | RR | | | Russell Seymour [RSA] d. Sjowall | 6-3 6-3 6-0 | | | | | | | | | |