More reign: A timeline of Serena Williams' 23 major titles

She surprised us all when she won her first Grand Slam title as a 17-year-old at the 1999 US Open. Then, with her power, speed and courage, we came to expect it.

Serena Williams won her 23rd Grand Slam title, an Open era record, Saturday at the Australian Open with a 6-4, 6-4 victory over Venus Williams. Only Margaret Court, who claimed 24 Grand Slam titles between 1960 and 1973, has more.

A timeline, spanning 6,349 days, of Serena's unparalleled reign: