| Madison Square Garden Open Tennis Championship | |
| Type: | defunct |
| Tour: | ILTF World Circuit (1968–70) |
| Event Name: | Madison Square Open Tennis Championship (1968-70) |
| Location: | New York City, United States |
| Venue: | Madison Square Garden |
| Surface: | Carpet indoors |
The Madison Square Garden Open Tennis Championship [1] [2] also known as the Madison Square Garden Challenge Trophy[3] and New York Indoor[1] was a men's and women's open international indoor carpet court tennis tournament founded in 1968. It was organised by the USNLTA and played at Madison Square Garden, New York City, United States until 1970. This international tournament was part of the ILTF World Circuit until 1970 when it was replaced Clean Air Classic.[4]
On 25 March 1968 the Madison Square Open Tennis Championship was established.[1] The tournament was organised by the USNLTA and was played on indoor carpet courts. The first two editions were played in the standard tournament format, the 1970 and final edition was played as a round robin tournament with a third and fourth place play-off then a final.[5]
In 1971 the owners of Madison Square Garden chose not to renew the tournament and the US tennis Association looked for a replacement New York Indoor event, they approached Combustion Equipment Associates Inc to sponsor a new event, which led to the Clean Air Classic that would be played across three venues in Hawthorne, New Jersey and the Vanderbilt International Raquet Club, culminating in the final at the Seventh Regiment Armory.[4]
(incomplete roll)
| Year | Winners | Runners-up | Score |
|---|---|---|---|
| 1968[6] |  Arthur Ashe |  Roy Emerson | 6-4, 6–4, 7–5. |
| 1969[7] |  Andrés Gimeno | Arthur Ashe | 6-1, 6–2, 3–6, 6–8, 9–7. |
| 1970 | Manuel Santana | Stan Smith | 6-4, 6–2. |
(incomplete roll)