Second-seeded Caroline Wozniacki has come from 5-1 down in the third set and saved two match points to beat Jana Fett 3-6, 6-2, 7-5 in the second round.
Fett is ranked 119th and was making her first appearance in the main singles draw of a Grand Slam tournament.
Wozniacki twice broke Fett's service while the Croatian player was serving for the match, including the two match points in the seventh game.
Wozniacki then broke Fett's service in the 11th game, helped by a Fett double-fault on break point and an unforced error by the Croatian which ended a 26-point rally.
She then held serve, clinching it on her first match point when Fett netted a backhand, giving her a six-game winning streak to end the match.
