6: Years to the day since Caroline Wozniacki last held the World No.1 ranking, setting a record the longest game between stays at No.1. The previous record belonged to Serena Williams (5 years, 29 days).
43: Grand Slam appearances for Caroline Wozniacki before winning a major. Flavia Pennetta holds the record, needing 49 appearances before she won the 2015 US Open.
3: Players who have earned more career prize-money than Caroline Wozniacki. With her Australian Open title, the Dane moves ahead of both Victoria Azarenka and Agnieszka Radwanska, and trails only Serena Williams, Venus Williams, and Maria Sharapova.
5: Players born in the 1990s to win a Slam title. Caroline Wozniacki joins the exclusive club along with Petra Kvitova, Garbiñe Muguruza, Sloane Stephens, and Jelena Ostapenko.
2: Times in the last nine Australian Open finals that the top 2 seeds squared off.
10: Of the last 11 Australian Open titles have been won by a Top 5 seed. The only exception during that span came in 2016 when No.7 seed Angelique Kerber defeated No.2 seed Serena Williams.
90: Total winners hit by Simona Halep in her last two matches against Angelique Kerber and Caroline Wozniacki.
5: Match points saved by Simona Halep en route to her first Australian Open final. Halep saved triple-match point against Lauren Davis in the third round and double-match point against Angelique Kerber in the semifinal.
2: Match points saved by Caroline Wozniacki en route to the Australian Open title. Wozniacki rallied from 1-5, 40-15 down against Croatian qualifier Jana Fett in the second round to win six straight games to close the match.
2016: The last time a player saved match point en route to a Slam title. Angelique Kerber saved match point against Misaki Doi in the first round and went on to win her first major title.
2: Slam finals made by Simona Halep in the last nine months.
Youth is served
6: Players who have scored wins over both Serena and Venus Williams before celebrating their 21st birthdays. With her first-round win over Venus, Belinda Bencic joined a group that includes Anna Chakvetadze, Kim Clijsters, Justine Henin, Martina Hingis, and Maria Sharapova.
15: Year-old Marta Kostyuk became the youngest player ever to play the main draw at the Australian Open. After tallying wins over Peng Shuai and Olivia Rogowska, Kostyuk became the third-youngest woman to reach the third round at the Australian Open since the tournament moved to a 128-player draw.
18: First time Slam semifinalists in the last 19 majors. Elise Mertens joined the list in Melbourne.
17: Rankings spots Elise Mertens moves up after her semifinal run at the Australian Open, from No.37 to her Top 20 debut at No.20. Mertens is the first Belgian ranked inside the Top 20 since Kirsten Flipkens in 2014 and the youngest since Yanina Wickmayer in 2011.
1990: The last time a Japanese player younger than 20-year-old Naomi Osaka made the Round of 16 at the Australian Open. Kimiko Date made the Round of 16 that year as a 19-year-old.
1996: The last time a player younger than 15-year-old Marta Kostyuk made the third round at the Australian Open (Martina Hingis).
2: Times in the Open Era that three Ukrainian women made the third round of the Australian Open. This year, Elina Svitolina, Lesia Tsurenko, and Marta Kostyuk all progressed to the third round, with Svitolina advancing to the quarterfinals.
2008: The last time three qualifiers advanced to the third round of the Australian Open. This year saw Marta Kostyuk, Denisa Allertova, and Luksika Kumkhum end the drought.
3: Lucky Losers who have advanced to the third round of the Australian Open in the last 20 years. American Bernarda Pera became the third after stunning Johanna Konta in the second round, joining a lucky club that includes Daria Kasatkina (2015 US Open) and Ons Jabeur (2017 Roland Garros).
Ace race underway
3: Consecutive years Karolina Pliskova has led the tour in aces.
2: Players who hit over 400 aces last season. Karolina Pliskova struck 452 and Julia Goerges struck 412.
61: Aces hit by Julia Goerges so far in 2018. Goerges sits atop the WTA aces leaderboard, hitting her 61 aces in just seven matches. She is ahead of Elina Svitolina (60 aces in 10 matches), Caroline Wozniacki (58 aces in 12 matches) and Karolina Pliskova (53 aces in 8 matches).
2: Players who hit the fastest recorded serve at the Australian Open. Both Madison Keys and Timea Babos fired serves at 119.30 mph / 192 kmh, which are also the fastest recorded serves in 2018 so far.
1: 2018 tournament champion that failed to advance to the quarterfinals in Melbourne. Elina Svitolina (Brisbane), Angelique Kerber (Sydney), Simona Halep (Shenzhen), and Elise Mertens all advanced to the final eight. The only champion from the first two weeks of the season who did not advance was Julia Goerges, who defeated Caroline Wozniacki in the Auckland final but lost to Alizé Cornet in the second round of the Australian Open.
47: Consecutive Slams for Agnieszka Radwanska, the longest active streak for consecutive main draw appearances. The streak began with her main draw debut at 2006 Wimbledon. Radwanska assumed the longest active streak from Jelena Jankovic, who had played 57-consecutive Slams but was forced to withdraw from the Australian Open due to a back injury.
48: Slam appearances for Alizé Cornet, who has yet to make a Slam quarterfinal. Cornet leads all active players, with Julia Goerges, Bethanie Mattek-Sands, Monica Niculescu, and Pauline Parmentier all tied at 40 appearances.
10: Years since Hsieh Su-Wei advanced to the Round of 16 at the Australian Open. Hsieh first accomplished the feat in 2008 and defeated Garbiñe Muguruza and Agnieszka Radwanska en route to the Round of 16 this year.
6: Current or former No.1 players currently ranked in the Top 10. Caroline Wozniacki is joined by Simona Halep, Garbiñe Muguruza, Karolina Pliskova, Venus Williams, and Angelique Kerber.
2: Players who dropped out of the Top 10 after the Australian Open. Johanna Konta dropped one spot to No.11 and CoCo Vandeweghe, a semifinalist in 2016, dropped nine spots to No.18.
0: Points on Serena Williams' ranking, after her 2,000 points from winning the Australian Open last year fell off on Monday. She can still enter tournaments with her special ranking or with a wildcard.
Statistics and information provided by SAP Tennis Analytics.