1987 King Cup
The 1987 King Cup was the 29th season of the knockout competition since its establishment in 1956. Al-Nassr were the defending champions and successfully defended their title by beating Al-Hilal 1–0 in the final. They became the first team since Al-Ahli in 1979 to successfully defend the title.
Bracket
Note: H: Home team, A: Away teamSource:
Round of 16
The Round of 16 matches were held on 23, 26 and 27 February 1987.| Home team | Score | Away team |
| Al-Hilal | 2–1 | Al-Kawkab |
| Al-Nassr | 2–0 | Al-Taawoun |
| Al-Ettifaq | 2–2 | Al-Shabab |
| Al-Wehda | 2–1 | Al-Raed |
| Hajer | 1–1 | Al-Tai |
| Al-Nahda | 3–1 | Al-Ansar |
| Al-Ittihad | 0–0 | Al-Ahli |
| Al-Qadsiah | 1–2 | Al-Arabi |
Quarter-finals
The Quarter-final matches were held on 2 March 1987.| Home team | Score | Away team |
| Al-Hilal | 4–0 | Al-Arabi |
| Al-Ettifaq | 1–1 | Al-Nahda |
| Hajer | 2–0 | Al-Wehda |
| Al-Ittihad | 1–2 | Al-Nassr |