The 40-year-old had to work a lot to achieve this success.
Later on, Serena was coached by Rick Macci.
Rick Macci has coached many great players in his career.
However, Serena was among his favorite students.
Macci tweeted, “Serena had more time than any student I ever taught. A unique quality that is genetic.”
He also mentioned that Serena was always mentally strong.