India, March 18 -- Mirra Andreeva likes to carry a little notebook with her to court. It contains handwritten notes on the opponents the 17-year-old has faced, and she often flips through it during mid-match changeovers (TV cameras snooped in to capture a page headlined, "INDIAN WELLS Rybakina").

Over the years, as the annals of women's tennis turn chapters on generational prodigies, Andreeva's name will stand out in the current era. As the youngest champion of the prestigious Indian Wells tournament since Serena Williams in 1999. As the youngest woman to win back-to-back WTA 1000 events since Martina Hingis in 1997. And as one of only three women aged under 18 to have beaten the world No.1 and No.2 in the same tournament.

The other two...