When you're losing 0-6 0-5 and facing match point, the chances are there is no way back.
But the old saying goes that winners never quit - and Tara Moore refused to give up when she found herself in that exact position on Tuesday.
In a show of extraordinary grit, the British number nine saved herself from being double bageled at 30-40 down, and went on to beat French third seed Jessika Ponchet 0-6 7-6 6-3 at the ITF World Tour event in Sunderland.
The greatest comeback in tennis history? Well, the 26-year-old said on social media that it had been "never in doubt".