1989 PBA Open Conference
The 1989 Philippine Basketball Association Open Conference was the first conference of the 1989 PBA season. It started on March 5 and ended on May 21, 1989. The tournament is an Import-laden format, which requires an import or a pure-foreign player for each team.
Format
The following format will be observed for the duration of the conference:- Double-round robin eliminations; 10 games per team; Teams are then seeded by basis on win-loss records.
- Team with the worst record after the elimination round will be eliminated.
- Semifinals will be two round robin affairs with the five remaining teams. Results from the elimination round will be carried over.
- The top two teams in the semifinals advance to the best of seven finals. The last two teams dispute the third-place trophy in a best-of-five playoff.
Elimination round
| # | Team Standings | W | L | PCT | GB |
| 1 | San Miguel Beermen | 10 | 0 | 1.000 | –- |
| 2 | Presto Ice Cream | 5 | 5 | .500 | 5 |
| 3 | Formula Shell Zoom Masters | 5 | 5 | .500 | 5 |
| 4 | Purefoods Hotdogs | 4 | 6 | .400 | 6 |
| 5 | Alaska Milkmen | 3 | 7 | .300 | 7 |
| 6 | Añejo Rum 65ers | 3 | 7 | .300 | 7 |