1989 OTB Open – Men's Singles

Tim Mayotte was the defending champion, but did not participate this year. Simon Youl won the tournament, beating Scott Davis in the final, 2–6, 6–4, 6–4.

Source: Wikipedia DBpedia

What is 1989 OTB Open – Men's Singles subject of?

1989 OTB Open – Men's Singles is subject of 1989 Grand Prix (tennis) and OTB Open.