Karolina Muchova narrowly avoided a deciding-set tiebreaker, beating third-seeded Karolina Pliskova 4-6, 7-5, 13-11 to reach the Wimbledon quarterfinals.
Muchova won the last three games of the match and converted her third match point with a return that clipped the net cord.
Pliskova broke for an 11-10 lead but couldn't serve out the match as she was broken back at love.
If the score had reached 12-12, the pair would have played the first deciding-set tiebreaker since Wimbledon introduced new rules for this year's tournament.
In the past, there were no tiebreakers in deciding sets.
The longest match in Wimbledon history was in 2010, when John Isner beat Nicolas Mahut 70-68 in the fifth set. Last year, Kevin Anderson beat Isner 26-24 in the fifth set in the semifinals.