Nagareyama CH 1981 ATP
Final
| Winner | Loser | Score | |
|---|---|---|---|
| Ron Hightower | d. | Matt Doyle | 7-5 7-6 |
Semifinals
| Winner | Loser | Score | |
|---|---|---|---|
| Matt Doyle | d. | Dave Siegler | 6-4 6-3 |
| Ron Hightower | d. | Russell Simpson | 6-4 6-4 |
Quarterfinals
| Winner | Loser | Score | |
|---|---|---|---|
| Dave Siegler | d. | Jim Delaney | 6-4 2-6 6-4 |
| Matt Doyle | d. | Mike Cahill | 5-7 6-4 6-3 |
| Ron Hightower | d. | Syd Ball | 7-6 6-1 |
| Russell Simpson | d. | Damir Keretic | 6-4 6-7 6-2 |
Round of 16
| Winner | Loser | Score | |
|---|---|---|---|
| Dave Siegler | d. | Beejong Sisson | 6-1 6-0 |
| Damir Keretic | d. | Cary Stansbury | 6-4 6-4 |
| Jim Delaney | d. | Roland Stadler | 6-1 6-4 |
| Ron Hightower | d. | Cliff Letcher | 6-4 6-2 |
| Matt Doyle | d. | Jimmy Arias | 6-4 6-2 |
| Mike Cahill | d. | Tsuyoshi Fukui | 6-3 6-4 |
| Syd Ball | d. | Andy Kohlberg | 7-6 6-3 |
| Russell Simpson | d. | Bill Maze | 0-6 6-4 7-6 |
Round of 32
| Winner | Loser | Score | |
|---|---|---|---|
| Beejong Sisson | d. | Eiji Takeuchi | 6-4 6-1 |
| Bill Maze | d. | Jorge Andrew | 6-1 6-1 |
| Andy Kohlberg | d. | Warren Maher | 3-6 7-5 7-5 |
| Damir Keretic | d. | Jun Kamiwazumi | 6-4 6-3 |
| Ron Hightower | d. | Matt Mitchell | 6-1 3-6 6-2 |
| Tsuyoshi Fukui | d. | Charlie Fancutt | 6-4 6-4 |
| Jim Delaney | d. | Bruce Kleege | 6-4 6-3 |
| Jimmy Arias | d. | Markus Gunthardt | 6-1 6-1 |
| Cary Stansbury | d. | Greg Whitecross | 4-6 6-2 7-6 |
| Roland Stadler | d. | Shinichi Nishino | 6-1 6-1 |
| Cliff Letcher | d. | Wayne Pascoe | 1-6 6-1 6-3 |
| Matt Doyle | d. | Mike Shore | 6-1 6-2 |
| Mike Cahill | d. | Scott Mccain | 6-3 3-6 6-3 |
| Syd Ball | d. | Craig A Miller | 7-6 6-2 |
| Dave Siegler | d. | Billy Martin | 6-3 6-4 |
| Russell Simpson | d. | Shinichi Sakamoto | 7-5 6-4 |