Navarro, 23, entered the semis after beating Spain's Paula Badosa. She is world no. 12 in women's singles.
Her father, Ben Navarro, is the founder and CEO of Sherman Financial Group, LLC, and the owner of Credit One Bank.
According to Forbes, Ben Navarro has an estimated net worth of USD 1.5 billion.
The world no. 3 beat Poland's Iga Swiatek in the quarterfinal.
The 30-year-old's father, Terry Pegula, founded East Resources, a natural gas drilling company which he sold to Royal Dutch Shell for USD 4.7 billion.
According to Forbes, he has an estimated net worth of USD 7.7 billion.
Fritz, 26, prevailed over Germany's Alexander Zverev in the quarterfinal.
The world no. 5 is the son of tennis legend Kathy May, the great-granddaughter of David May, founder of The May Department Stores, now called Macy's.
It was acquired by the Federation Department Stores for USD 11 billion and was consolidated into Macy's existing branches.