| Champ: |  Rod Laver |
| Runner: | Tony Roche |
| Score: | 6–3, 8–6, 6–2 |
| Draw: | 48 |
| Seeds: | 12 |
| Type: | singles doubles |
| Before Name: | Philadelphia International Indoor Open Championships – Singles |
| After Name: | Philadelphia International Indoor Open Championships – Men's singles |
See main article: article and 1970 ITPA Open Indoor. Rod Laver was the defending champion.
Laver successfully defended his title, defeating Tony Roche 6–3, 8–6, 6–2 in the final.
Rod Laver (champion) Tony Roche (final) John Newcombe (semifinals) Ken Rosewall (second round)
Andrés Gimeno (first round) Fred Stolle (third round)
Arthur Ashe (third round) Roy Emerson (third round) Earl Butch Buchholz (quarterfinals) Stan Smith (third round) Dennis Ralston (semifinals)