NEW YORK, NY, USA - Serena Williams battled past Venus Williams in an electric quarterfinal against Venus Williams at the US Open on Tuesday night, and she's now two wins from history - not just the Calendar Year Grand Slam, but also her 22nd Grand Slam title, which would tie the Open Era record.
When the draw came out it was the match-up everyone was waiting for - two of the WTA's biggest legends, and, closer to heart for the New York crowds, two of America's greatest sporting legends.
Serena, the No.1 seed, was the first to draw blood, sharp on serve and even sharper off the ground to roll through the first set, 6-2, but from 1-all in the second set it was all Venus - the No.23 seed came alive in a big way, reeling off five games in a row to totally run away with the second set, 6-1.
But from the beginning of the final frame Serena dialed right back in - she held serve, ripped a huge backhand down the line winner to break for 2-0 then held again for 3-0, and she never looked back - the two traded holds until Serena finally served it out, blasting her 12th ace to clinch it, 6-2, 1-6, 6-3.
The match was of the highest quality, too - the numbers tell the story, Serena finishing with a +13 winners to unforced errors differential (35 to 22) and Venus finishing with +9 differential (24 to 15).
Serena was asked afterwards whether anyone else has given her more trouble in her career.
"No. No. She's still playing, as well," she said. "I've played a lot of great players like Lindsay and Jennifer and Martina and Kim and Justine. I have had a lot of losses against those players, as well. But they didn't know my game as well as Venus, and just didn't beat me as many times as Venus has.
"It was great to see her do so well tonight. She was at an unbelievable level today. Down to the match point, it was just not easy. It's probably the toughest match I've played in a really, really, really long time where I wasn't actually beating myself. I was out there facing an incredibly tough opponent.
"Seeing she has that level is so inspiring. Against any other player she for sure would have won."
And what about the hug - one of the warmest hugs we've seen in the sport for a while - at the net?
"I just said, 'I'm so happy for you,'" Venus recalled in her post-match press conference.
"I don't remember what else I said after that. Just moments - just the moment."
"I'll look back on it fondly," Serena said. "It means a lot to me. Obviously we are very, very tough competitors on the court, but once the match is over, we're sisters, we're roommates, we're all that."
At the end of the day, though, Serena improved to 16-11 lifetime against Venus, and, having won the Australian Open, French Open and Wimbledon already this season, the World No.1 is now two wins away from completing her first Calendar Year Grand Slam - winning all four majors in a single season.