The U.S. Pro Indoor (mainly known as such during its run, but also as the U.S. Professional Indoor, the Ebel U.S. Pro Indoor, the Comcast U.S. Indoor, and the Advanta Championships for sponsorship reasons) is a defunct professional tennis tournament played on indoor carpet courts, and indoor hard courts. It was part of the World Championship Tennis (WCT) circuit, of the Super Series of the Grand Prix Circuit, of the Championship Series of the Association of Tennis Professionals (ATP) Tour, and of the International Series Gold of the ATP Tour. It was held annually first at the Spectrum, and then at the CoreStates Center, Philadelphia, Pennsylvania, United States, from 1968 to 1998.
As part of the Grand Prix top tier of tournaments, the Philadelphia event known as the U.S. Pro Indoor since 1975, saw American players dominating the fields in the 1970s and 1980s, with Tim Mayotte reaching four finals, World No. 1s Jimmy Connors and John McEnroe six finals each, and Czechoslovak Ivan Lendl three. In 1985, Swiss watch company Ebel S.A. started its six-year sponsorship of the event, the tournament becoming until 1990 the Ebel U.S. Pro Indoor. The event entered the new ATP circuit in 1990 as part of the Championship Series, to see eighteen-year-old, and future US Open champion Pete Sampras win his first career title against Andres Gomez.
In 1991, the event lost Ebel's sponsorship, and went back to being the U.S. Pro Indoor for two editions, before Comcast became the sponsor of the event in 1992, effectively saving it from being discontinued. In the following years, the Comcast U.S. Indoor's prize money was reduced to less than a million dollars, preventing the creation of attractive line ups, and gaining the nickname "Comatose U.S. Indoor".. In 1997, Advanta, already the sponsor of the 1971-created women's tournament of Philadelphia, the Advanta Championships, since 1995, took upon the sponsorship of the men's event, which also became the Advanta Championships. Pete Sampras won his third and fourth Philadelphia titles in the last two editions of the event, now taking place on indoor hard courts at the CoreStates Center, before it was definitely discontinued in 1998.
| Year | Champion | Runner-up | Score |
|---|---|---|---|
| 1998 | Pete Sampras | Thomas Enqvist | 7–5, 7–6(3) |
| 1997 | Pete Sampras | Patrick Rafter | 5–7, 7–6(4), 6–3 |
| 1996 | Jim Courier | Chris Woodruff | 6–4, 6–3 |
| 1995 | Thomas Enqvist | Michael Chang | 0–6, 6–4, 6–0 |
| 1994 | Michael Chang | Paul Haarhuis | 6–3, 6–2 |
| 1993 | Mark Woodforde | Ivan Lendl | 5–4 retired |
| 1992 | Pete Sampras | Amos Mansdorf | 6–1, 7–6(4), 2–6, 7–6(2) |
| 1991 | Ivan Lendl | Pete Sampras | 5–7, 6–4, 6–4, 2–6, 6–3 |
| 1990 | Pete Sampras | Andres Gomez | 7–6, 7–5, 6–2 |
| 1989 | Boris Becker | Tim Mayotte | 7–6, 6–1, 6–3 |
| 1988 | Tim Mayotte | John Fitzgerald | 4–6, 6–2, 6–2, 6–3 |
| 1987 | Tim Mayotte | John McEnroe | 3–6, 6–1, 6–3, 6–1 |
| 1986 | Ivan Lendl | Tim Mayotte | walkover |
| 1985 | John McEnroe | Miloslav Mecir | 6–3, 7–6, 6–1 |
| 1984 | John McEnroe | Ivan Lendl | 6–3, 3–6, 6–3, 7–6 |
| 1983 | John McEnroe | Ivan Lendl | 4–6, 7–6, 6–4, 6–3 |
| 1982 | John McEnroe | Jimmy Connors | 6–3, 6–3, 6–1 |
| 1981 | Roscoe Tanner | Wojtek Fibak | 6–2, 7–6, 7–5 |
| 1980 | Jimmy Connors | John McEnroe | 6–3, 2–6, 6–3, 3–6, 6–4 |
| 1979 | Jimmy Connors | Arthur Ashe | 6–3, 6–4, 6–1 |
| 1978 | Jimmy Connors | Roscoe Tanner | 6–2, 6–4, 6–3 |
| 1977 | Dick Stockton | Jimmy Connors | 3–6, 6–4, 3–6, 6–1, 6–2 |
| 1976 | Jimmy Connors | Bjorn Borg | 7–6, 6–4, 6–0 |
| 1975 | Marty Riessen | Vitas Gerulaitis | 7–6(1), 5–7, 6-2, 6–7(0), 6–3 |
| 1974 | Rod Laver | Arthur Ashe | 6–1, 6-4, 3–6, 6–4 |
| 1973 | Stan Smith | Robert Lutz | 7–6(2), 7–6(5), 4–6, 6–4 |
| 1972 | Rod Laver | Ken Rosewall | 4–6, 6–2, 6–2, 6-2 |
| 1971 | John Newcombe | Rod Laver | 7–6(5), 7–6(1), 6–4 |
| 1970 | Rod Laver | Tony Roche | 6–3, 8–6, 6–2 |
| 1969 | Rod Laver | Tony Roche | 7–5, 6–4, 6–4 |
| 1968 | Manuel Santana | Jan Leschly | 8–6, 6–3 |