Tennis' famed Williams sisters - Venus and Serena - have made it to the final of the 2017 Australian Open women's singles final.
Serena, 35, beat unseeded Croat Mirjana Lucic-Baroni 6-2, 6-1 in just 50 minutes on Thursday (Jan 26). Earlier in the day, Venus, 36, rolled back the years to beat fellow-American Coco Vandeweghe 6-7 (3-7), 6-2, 6-3 in the other semi-final.
In the modern era of tennis, we look at one of the most talented pairs of siblings ever to grace the court with their athleticism, fighting attitude, and pure unbridled joy whenever they win, even at the expense of each other. We also look at how they stack up against each other in numbers, and what's at stake in the final on Saturday.
1. Previous Australian Open final clash
2003: The only time Venus and Serena pulled off such a feat in Australia, with Serena winning the title 7-6 (7-4), 3-6, 6-4.
If you're wondering, in popular culture then, Norah Jones won Song of the Year for Don't Know Why at the Grammys that year. Chicago won the Best Picture award at the Oscars then.
2. Previous Grand Slam final clash
2009: The last time the Williams sisters contested a Grand Slam singles final, and it was at Wimbledon. Serena won 7-6 (7-3), 6-2.
In popular culture then, Coldplay won Song of the Year for Viva La Vida at the Grammys that year. Slumdog Millionaire won the Best Picture award at the Oscars then.
3. Hail Venus
Venus' comeback to the top echelon of the sport is remarkable, as she was diagnosed with Sjogrens Syndrome six years ago. It is a debilitating autoimmune disease in which the white blood cells attack the glands that produce tears and saliva. She said it affects her energy level and causes fatigue and joint pain.
4. Oldest Women's Grand Slam singles final in Open era
The Williamses have a combined age of 71, but in the era of power tennis, Venus and Serena have shown that age is just a number.
5. Serena superior
The sisters have met each other in 8 Grand Slam singles finals so far and Serena holds a 6-2 advantage.
2001 US Open final: Venus wins 6-2, 6-4
2002 French Open final, Serena wins 7-5, 6-3
2002 Wimbledon final, Serena wins 7-6 (4), 6-3
(With this win above, Serena supplanted Venus as the No. 1 player in the world then.)
2002 US Open final, Serena wins 6-4, 6-3
2003 Australian Open final, Serena wins 7-6 (4), 3-6, 6-4
2003 Wimbledon final, Serena wins 4-6, 6-4, 6-2
2008 Wimbledon final, Venus wins 7-5, 6-4
2009 Wimbledon final, Serena wins 7-6 (3), 6-2
6. Who's chasing how many Majors
Venus hopes to win an eighth major title, and her first since Wimbledon in 2008. If Serena wins, it would take her past Steffi Graf's Open-era record of 22 major wins. A win would also draw her to within one of the all-time benchmarks of 24 Grand Slam singles titles - set by Australian Margaret Court.
7. Top spot at stake
Serena - ranked second behind Germany's Angelique Kerber now - can snatch the world No. 1 spot back if she beats 17th-ranked Venus on Saturday.
Sources: Australian Open, WTA.com, AFP, BBC, ABC