Sloane Stephens advanced to the quarter-finals of the Australian Open with a 6-1, 3-6, 7-5 win over Bojana Jovanovski of Serbia.
The 19-year-old American is into the quarter-finals at a major for the first time.
Sloane ranger: American teen Stephens is through to the quarter finals
Determined: Stephens beat Jovanovski in three sets
In the third set featuring five breaks of serve, Stephens broke at love in the 12th game and then held serve in the final game to close out the match in 1hr, 53min.
The 29th-seeded Stephens could face third seed Serena Williams, one of her childhood heroes, in her next match.
The 15-time Grand Slam winner was playing No 14-ranked Maria Kirilenko in a fourth-round match later on Monday at Rod Laver Arena.
Out: Jovanovski crashed out at the fourth round stage