# 1973 USLTA Indoor Circuit

The 1973 USLTA Indoor Circuit was a professional tennis circuit held in the United States from January until March that year. It consisted of 13 tournaments and was organized by Bill Riordan and sanctioned by the United States Lawn Tennis Association (USLTA).

## Schedule
### January

| Week of | Tournament | Champion | Runner-up | Semifinalists | Quarterfinalists |
| 1 Jan | Baltimore International Indoors Baltimore, Maryland, U.S. Carpet – $15,000 – 16S/8D | Jimmy Connors 6–4, 7–5 | Sandy Mayer | Clark Graebner Dick Stockton | Paul Gerken Ian Crookenden Pat Cramer Herb Fitzgibbon |
| 1 Jan | Baltimore International Indoors Baltimore, Maryland, U.S. Carpet – $15,000 – 16S/8D | Jimmy Connors Clark Graebner 3–6, 6–2, 6–3 | Sandy Mayer Paul Gerken | Clark Graebner Dick Stockton | Paul Gerken Ian Crookenden Pat Cramer Herb Fitzgibbon |
| 15 Jan | Birmingham International Birmingham, Alabama, U.S. Carpet – $15,000 – 16S/9D | Sandy Mayer 6–4, 7–6 | Charlie Owens | Clark Graebner Jürgen Fassbender | Pat DuPré Pat Cramer John Cooper Mike Belkin |
| 15 Jan | Birmingham International Birmingham, Alabama, U.S. Carpet – $15,000 – 16S/9D | Jürgen Fassbender Pat Cramer 6–4, 7–5 | Ion Țiriac Clark Graebner | Clark Graebner Jürgen Fassbender | Pat DuPré Pat Cramer John Cooper Mike Belkin |
| 15 Jan | Roanoke International Roanoke, Virginia, U.S. Carpet – $7,500 – 8S/4D | Jimmy Connors 6–2, 6–3 | Ian Fletcher | Tito Vázquez John Paish | Jaime Pinto Bravo Ian Crookenden Butch Seewagen Juan Gisbert Sr. |
| 15 Jan | Roanoke International Roanoke, Virginia, U.S. Carpet – $7,500 – 8S/4D | Jimmy Connors Juan Gisbert Sr. 6–0, 7–6 | Ian Fletcher Butch Seewagen | Tito Vázquez John Paish | Jaime Pinto Bravo Ian Crookenden Butch Seewagen Juan Gisbert Sr. |
| 28 Jan | Midlands International Omaha, Nebraska, U.S. Carpet – $15,000 – 16S/16S | Ilie Năstase 5–0, ret. | Jimmy Connors | Juan Gisbert Sr. Jürgen Fassbender | Pat Cramer Ion Țiriac Paul Gerken Sandy Mayer |
| 28 Jan | Midlands International Omaha, Nebraska, U.S. Carpet – $15,000 – 16S/16S | William Brown Mike Estep walkover | Jimmy Connors Juan Gisbert Sr. | Juan Gisbert Sr. Jürgen Fassbender | Pat Cramer Ion Țiriac Paul Gerken Sandy Mayer |
| 28 Jan | Des Moines International Des Moines, Iowa, U.S. Hard – $15,000 – 16S/16S | Clark Graebner 7–5, 5–7, 6–4 | Nicholas Kalogeropoulos | Karl Meiler Juan Gisbert Sr. | Szabolcs Baranyi Jaime Pinto Bravo Pat Cramer Ian Fletcher |
| 28 Jan | Des Moines International Des Moines, Iowa, U.S. Hard – $15,000 – 16S/16S | Jan Kukal Jiří Hřebec 4–6, 7–6, 6–1 | Ion Țiriac Juan Gisbert Sr. | Karl Meiler Juan Gisbert Sr. | Szabolcs Baranyi Jaime Pinto Bravo Pat Cramer Ian Fletcher |

### February

| Week of | Tournament | Champion | Runner-up | Semifinalists | Quarterfinalists |
| 5 Feb | Salt Lake City, Utah, U.S. Hard – 16S/8D | Jimmy Connors 6–1, 6–2 | Paul Gerken | Ilie Năstase Szabolcs Baranyi | Jiří Hřebec Jürgen Fassbender Juan Gisbert Sr. Mike Estep |
| 5 Feb | Salt Lake City, Utah, U.S. Hard – 16S/8D | Mike Estep Raúl Ramírez 6–4, 7–6 | Jan Kukal Jiří Hřebec | Ilie Năstase Szabolcs Baranyi | Jiří Hřebec Jürgen Fassbender Juan Gisbert Sr. Mike Estep |
| 12 Feb | Canadian Indoor Championships Calgary, Alberta, Canada Hard (i) – $20,000 – 28S/14D | Ilie Năstase 6–4, 7–6$^{(5–4)}$ | Paul Gerken | Ion Țiriac Juan Gisbert Sr. | Nicholas Kalogeropoulos Pat Cramer Jürgen Fassbender Karl Meiler |
| 12 Feb | Canadian Indoor Championships Calgary, Alberta, Canada Hard (i) – $20,000 – 28S/14D | Ilie Năstase Mike Estep 6–7, 7–5, 6–3 | Péter Szőke Szabolcs Baranyi | Ion Țiriac Juan Gisbert Sr. | Nicholas Kalogeropoulos Pat Cramer Jürgen Fassbender Karl Meiler |
| 19 Feb | U.S. National Indoor Championships Salisbury, Maryland, U.S. Hard (i) – $50,000 – 64S/32D | Jimmy Connors 6–4, 7–6 | Karl Meiler | Frank Froehling Brian Gottfried | Charlie Owens Sandy Mayer John Austin Ilie Năstase |
| 19 Feb | U.S. National Indoor Championships Salisbury, Maryland, U.S. Hard (i) – $50,000 – 64S/32D | Jürgen Fassbender Juan Gisbert Sr. 2–6, 6–4, 6–3 | Clark Graebner Ilie Năstase | Frank Froehling Brian Gottfried | Charlie Owens Sandy Mayer John Austin Ilie Năstase |
| 26 Feb | Coliseum Mall International Hampton, Virginia, U.S. Carpet (i) – $35,000 – 32S/16D Singles – Doubles | Jimmy Connors 4–6, 6–3, 7–5, 6–3 | Ilie Năstase | Paul Gerken Mike Estep | Jürgen Fassbender Sherwood Stewart Clark Graebner Brian Gottfried |
| 26 Feb | Coliseum Mall International Hampton, Virginia, U.S. Carpet (i) – $35,000 – 32S/16D Singles – Doubles | Clark Graebner Ilie Năstase 6–2, 6–1 | Jimmy Connors Ion Țiriac | Paul Gerken Mike Estep | Jürgen Fassbender Sherwood Stewart Clark Graebner Brian Gottfried |

### March

| Week of | Tournament | Champion | Runner-up | Semifinalists | Quarterfinalists |
| 5 Mar | Paramus Tennis Classic Paramus, New Jersey, U.S. Hard (i) – 16S/8D | Jimmy Connors 6–1, 6–2 | Clark Graebner | Juan Gisbert Sr. Ilie Năstase | Sandy Mayer Ion Țiriac Vitas Gerulaitis Steve Siegel |
| 5 Mar | Garcia Classic San Juan, Puerto Rico, U.S. | Alex Metreveli 6–4, 6–4, 0–6, 7–5 | Roger Taylor | | |
| 19 Mar | Equity Funding Championship Washington, D.C., U.S. Carpet – 32S | Ilie Năstase 4–6, 6–2, 7–5, 6–2 | Jimmy Connors | Jürgen Fassbender Karl Meiler | Nicholas Kalogeropoulos Ian Fletcher Billy Martin Paul Gerken |
| 19 Mar | Mississippi Indoors Jackson, Mississippi, U.S. Hard – 16S/D16 | Eddie Dibbs 5–7, 6–1, 7–5 | Frew McMillan | Sherwood Stewart Raz Reid | Zan Guerry Jaime Pinto Bravo Charles Owens Clark Graebner |

## Prize money standings

| Rk | Name | Prize money |
| 1 | Jimmy Connors (USA) | $37,700 |
| 2 | Ilie Năstase (ROM) | $20,125 |
| 3 | Clark Graebner (USA) | $15,250 |
| 4 | Jürgen Fassbender (FRG) | $12,150 |
| 5 | Juan Gisbert Sr. (ESP) | $10,375 |
| 6 | Karl Meiler (FRG) | $9,525 |
| 7 | Sandy Mayer (USA) | $9,425 |
| 8 | Paul Gerken (USA) | $8,975 |
| 9 | Nicky Kalo (GRE) | $6,300 |
| 10 | Ion Țiriac (ROM) | $6.050 |