Heather Watson produced a miraculous escape from three match points down to beat Ksenia Pervak and reach the third round of the Australian Open.
The British number one, 20, looked as good as out when she trailed the Kazakh by a set and 6-3 in the second set tie-break on a blisteringly hot Court Eight.
But Watson refused to buckle, finally finding her rhythm from the baseline at the crucial moment, and she battled back to win 4-6 7-6 (9-7) 6-2 after three hours and two minutes.
She will play in-form fourth seed Agnieszka Radwanska in the last 32.
That will be a mighty test against a player who has won all 11 matches and two titles in 2013, but that is a concern for Friday.
For now, the world number 50 can reflect on a day when her tennis was way below par but her fighting spirit proved irresistible.
Whatever happens on Friday, Heather Watson will rise in the rankings to at least 43.
Great news for British tennis - at long last we're beginning to break through 