Aryna Sabalenka has seen it all before; Mirra Andreeva is learning every day. Sabalenka has won two Grand Slam titles and reached one major final; Andreeva is in her first major quarter-final. Sabalenka is 26 and the world No.2; Andreeva has only recently turned 17 and is ranked No.38.
And in the only two matches they have played (both on clay in Madrid), Sabalenka has won handily. On paper, it looks one-sided but there is more to big matches than bald facts.