<page_title> List of ATP number 1 ranked doubles tennis players </page_title> <section_title> Players who were ranked World No. 1 before having won a Grand Slam tournament </section_title> <table> <cell> United States David Pate <col_header> Player </col_header> </cell> <cell> January 14, 1991 <col_header> Date of first No. 1 position </col_header> </cell> <cell> 1991 Australian Open (January 1991) <col_header> First Grand Slam final reached </col_header> </cell> <cell> 1991 Australian Open (only title) <col_header> First Grand Slam title </col_header> </cell> </table>
At the 1991 Australian Open, Pate won his first and only Grand Slam title in men's doubles and gained the World No. 1 rank.