Sunday's the culmination of the Western & Southern Open at the Lindner Family Tennis Center in Mason, Ohio.
There will be first-time champions in men's and women's singles.
Up first at noon on Center Court is the men's doubles final between American's Steve Johnson and Austin Krajicek against Marcel Granollers, of Spain, and Horacio Zeballos, of Argentina.
Johnson and Krajicek are the first wild card doubles team to advance to the finals since 2002. Samantha Stosur and Shuai Zhang won their first doubles title in Cincinnati Saturday night by defeating No. 6 seed Gabriela Dabrowski and Luisa Stefani 7-5, 6-3.
The women's singles won't start before 2 p.m. on Center Court. The final features World No. 1 Ash Barty, of Australia, against Switzerland's Jil Teichmann.
Teichmann, at No. 76, is the lowest-ranked player in the final since 2008 (Nathalie Dechy, 92) and aims to be the sixth unseeded player all-time to win the title.
Barty, who just won Wimbledon last month, is trying to become the first Australian player to win the title since Evonne Goolagong in 1973.
The men's final between No. 3 Alexander Zverev and No. 4 Andrey Rublev will be the last match of the tournament and won't start before 4:30 p.m.
Zverev, who just won an Olympic gold medal in Tokyo, seeks to be the first player to win the W&S Open and the gold medal in the same year since Andre Agassi in 1996 and would be the first German player to win the championship since Boris Becker in 1985.
Rublev is the first No. 4 seed since Rafael Nadal in 2013 to reach the finals.
Road to the W&S Open finals: