It's not every day that Federer loses a match point in a U.S. Open semifinal.
They both had a match point and Serena eventually won it 7-6 in the third.
"I went for my shots on match point and it paid off, " said Hewitt.
But serve it out he did, as Murray sent a tired forehand long on match point.
Sharapova had the last laugh, whacking a forehand winner past Errani on match point.
"When you're in a situation like this, every point is like a match point, " said Schiavone.
She later dropped to her knees as a Sharapova backhand sailed into the net on match point.
Philippoussis finally cracked when he double-faulted at 5-5 in the third set tie-break to hand Ferreira match point.
Although she double-faulted on her first match point, she then served an ace on her third to win.
They triumphed on their first match point in front of a decent-sized crowd.
This was taken on the third match point to complete one of the Briton's most impressive victories on clay.
In the last game of the match, Errani hit two perfect drop shots, including one to save a match point.
But he hit back from 4-3 down to serve for the match and finally clinched victory with his fourth match point.
The world number one looked to be on her way out after facing match point at 5-6 in the second set.
An emotional Safina slammed her racquet into the dirt in frustration after making her seventh double-fault of the day on match point.
It was the third Grand Slam match in the past three years in which he has faced match point and still won.
Serving for the match at 5-4, he forced a match point, saved by Federer, who proceeded to break back to level at 5-5.
But Agassi served two consecutive aces to set up his third match point, and won with a forehand volley off a short return.
Sixth seed Clijsters trailed 5-2 and later faced match point in the deciding set against the Frenchwomen before a five-game rally transformed the semi-final.
The world number one set up match point with a serve-and-volley winner and then earned the victory when Lee hit a powerful backhand long.
The Belgian had been a set and 6-5 up when the line judge foot-faulted Williams on a second serve to give Clijsters match point.
After hitting a forehand a fraction wide of the line and losing his challenge in a review, Ferrer double-faulted to give Djokovic match point.
Leading 15-14, Federer forced his first match point against a tiring opponent who mishit a forehand to see his own hopes of victory cruelly ended.
In the tie-break, Burton and Morgan saved one match point but could not stop the next one and lost the first set in 56 minutes.
"I wasn't really nervous I was just not quick off the mark and she took advantage of that, " said Robson, who double-faulted on match point.
And the world number one got to match point with a spectacular 'hotdog' through-the-legs shot that he later described as the best of his career.
Djokovic could only smile at such an outrageous winner, and Federer followed it up with an unstoppable forehand return on match point to clinch victory.
With his confidence restored, the British number one was soon at match point on Nieminen's serve and took his second chance with a heavy return.
From match point to break point... second serve... netted by Roger.
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