While a trio of veterans made the headlines on day two, Melbourne Park belonged to a large group of teenage girls.
It was a Tuesday all about Japanese veteran Kimiko Date-Krumm, who at 42 became the oldest woman to win a match at the Australian Open.
A pair of tour veterans – Tommy Haas and Jarkko Nieminen – belied their years, with the Finn beating the German 19th seed 8-6 in the fifth set.
They are familiar names showing they can still get the job done on the big stage.
But there are new names – perhaps less familiar – who took big steps on the grand slam stage.
They come from the women's draw, which saw 10 teenagers progress through to the second round on day two.
Of 14 teenagers in action, only four – Caroline Garcia, Lauren Davis, Timea Babos and Australian Luke Saville – lost.
Davis and Babos lost to fellow teenagers, with the latter falling 11-9 in the third set to France's Kristina Mladenovic.
The highly rated Sloane Stephens wasted little time, thrashing Romanian Simona Halep 6-1 6-1 – as expected.
Laura Robson, 18, Jana Cepelova, 19, Donna Vekic, 16, and Luksika Kumkhum, 19, were also comfortable winners.
Thailand's Kumkhum, ranked 201 in the world, was a shock victor against 39th-ranked Swede Sofia Arvidsson.
Up-and-coming German Annika Beck stunned Kazakh 28th seed Yaroslava Shvedova – who at Wimbledon last year became the first woman in the Open era to win a golden set – 6-2 6-7 (7-9) 6-3
World number 122 Yulia Putintseva upset Christina McHale in three sets, while Daria Gavrilova got the better of fellow teen Davis, who was ranked 142 spots above her.
But the pick of the matches and upsets came on court 13, which was almost full towards the end of 19-year-old Garbine Muguruza's clash against Magdalena Rybarikova.
Rybarikova, 24, is the world number 64 but has always struggled at grand slams.
Despite having match points, she went down to the 112th-ranked Muguruza 4-6 6-1 14-12, with the deciding set lasting two hours and nine minutes.
Muguruza saved several match points – including one with a brilliant backhand winner down the line – and is 'rewarded' with a meeting against Serena Williams.
Women's tennis has good depth, some of which comes from these teenagers, who could surprise in the future, if not this year.