The Oslo Open is a defunct tennis tournament that was played on the Grand Prix tennis circuit in 1974. The event was held in Oslo, Norway and played on indoor courts. Jeff Borowiak won the singles title while Karl Meiler and Haroon Rahim partnered to win the doubles title.
| Year | Champion | Runner-up | Score |
|---|---|---|---|
| 1974 | Jeff Borowiak | Karl Meiler | 6–3, 6–2 |
| Year | Champion | Runner-up | Score |
|---|---|---|---|
| 1974 | Karl Meiler Haroon Rahim |
Jeff Borowiak Vitas Gerulaitis |
6–3, 6–2 |
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