Elena Rybakina has been a really consistent tennis player so far and her consistency is easily demonstrated by a milestone that was only done twice before her.
Rybakina has been playing superb tennis this year. On top of doing that, she's also been very consistent with it losing early in only a handful of events. She made it to the Australian Open final, Indian Wells final, Miami Open final and Rome final in the same year and that's been done only twice before.
Monica Seles did it many years ago in 1991 with Maria Sharapova doing the same a decade ago in 2012. Rybakina is now the 3rd player that reached the final in those events which just shows how hard it is. Being very consistent is generally the epitome of a sensational tennis player because so many fail to do it.