Serena Williams produced a stunning comeback to defeat Justine Henin 0-6 7-5 6-3 in Miami and claim her fourth Sony Ericsson Open title.
Serena Williams has been beaten only once this season
The American lost the first set in just 26 minutes and looked to be heading for a comprehensive defeat after being broken at the start of the second set.
But Williams saved two match points with Henin serving at 5-4 and won the next six games to take control.
And she closed out the two hour, 26 minute marathon with a service winner.
"It's just not in me to give up," said Williams, who has also won this title in 2002, 2003 and 2004.
"I'm definitely not a fearless individual. I just feel like when I get down, a part of me just plays better, and I think all champions have that. I just think it's not over, I've got to play better.
"When I play well, there aren't many players who can beat me."
The event was Williams' first tournament since winning the Australian Open in January.
She played better than me on the important points
Henin, who arrived in Miami following tournament wins in Dubai and Qatar, had never made it past the quarter-finals in Miami and looked set for victory when she raced through the opening set.
Williams failed to muster even a point on her own serve until the fifth game and finally won a game when she broke Henin to level the second set at 1-1.
Henin served for the match at 5-4 but Williams held on and started to take charge of the contest - taking a 3-0 lead in the decider.
Henin put the set back on serve with a break in the fifth game, although Williams broke again for a 5-3 lead and a chance to serve for the match.
Williams quickly found herself 40-0 down but she battled back with two stinging backhands and took the match with a second-serve winner on her first match point.
"Serena is a real fighter," said Henin. "She never gives up. She proved it on the match points, because she took her chances at the time.
"She played better than me on the important points.
"At the end she was better than me, she was really focused on every point. I gave my best but it wasn't enough.
"I was playing a good game, I was really aggressive, but when I had to close the match I maybe got a little bit tense."