Chris Evert (1)

November 1975-July 9, 1978

Martina Navratilova (2)

July 10, 1978-January 13, 1979

Chris Evert

January 14-27, 1979

Martina Navratilova

January 28-February 24, 1979

Chris Evert

February 25-April 15, 1979

Martina Navratilova

April 16-June 24, 1979

Chris Evert

June 25-September 9, 1979

Martina Navratilova

September 10, 1979-April 6, 1980

Tracy Austin (3)

April 7-20, 1980

Martina Navratilova

April 21-June 30, 1980

Tracy Austin

July 1-November 17, 1980

Chris Evert

November 18, 1980-May 2, 1982

Martina Navratilova

May 3-16, 1982

Chris Evert

May 17-June 13, 1982

Martina Navratilova

June 14, 1982-June 9, 1985

Chris Evert

June 10-October 13, 1985

Martina Navratilova

October 14-October 27, 1985

Chris Evert

October 28-November 24, 1985

Martina Navratilova

November 25, 1985-August 16, 1987

Steffi Graf (4)

August 17, 1987-March 10, 1991

Monica Seles (5)

March 11, 1991-August 4, 1991

Steffi Graf

August 5-11, 1991

Monica Seles

August 12-18, 1991

Steffi Graf

August 19-September 9, 1991

Monica Seles

September 9, 1991-June 6, 1993

Steffi Graf

June 7, 1993-February 5, 1995

A.Sanchez Vicario(6) 

February 6, 1995-February 19, 1995

Steffi Graf

February 20, 1995-February 26, 1995

A.Sanchez Vicario

February 27, 1995-April 9

Steffi Graf

April 10, 1995-May 14, 1995

A.Sanchez Vicario

May 15, 1995-June 11, 1995

Steffi Graf

June 12, 1995-August 20, 1995

Steffi Graf 
and Monica Seles

August 21, 1995-November 3rd, 1996

Steffi Graf

November 4 -17, 1996

Steffi Graf 
and Monica Seles

November 18 -24, 1996

Steffi Graf

November 25, 1996-March 30, 1997

Martina Hingis (7)

March 31, 1997-October 11, 1998 

Lindsay Davenport(8)

October 12, 1998 -February 7, 1999

Martina Hingis