Well of course Seles is x10 more impressive this is just very interesting and an impressive achievement. Also shows how wide open the game is other than serenaThis is an interesting bit of trivia, but I think it may be getting a bit too much attention.
For example 15 year old Seles already won a tour title before she made her French Open debut, where she made the semis, then won the title the next year at 16. She won 8 majors before turning 20.
Great win for 20 year old Ostapenko, but kind of puts her 'young phenom' attention into perspective.