Cause Anisimova just almost did. From 0-5 to 6-5 to 2-4 down in the tie-breaker.
Winning 6 games in a row from any scoreline would guarantee a set won unless you start from 0-5.Well, technically you did not stress those games would have to be in the same set, so then ofc it happens and not that rarely I assume
Otherwise I have no idea, though.
Sorry but I've just watched the HLs and it was actually Sharapova who won the 11th game after Pin levelling it to 5-5.Camille Pin was down 0-5 in the 3rd set against Sharapova in the first round of the 2007 Australian Open and came back to 6-5, only to lose the set 9-7. Sharapova was up 6-3 4-6 5-0, she ended up winning 6-3 4-6 9-7. That's also one of the 2 or 3 hottest matches recorded with temperatures being nearly 50 degrees Celsius (118 F). Interestingly enough, the other hottest match also had Maria in it at the Australian Open (2014 R2 vs Karin Knap which had a pretty similar scoreline of 6-3 4-6 10-8).