BRISBANE, SHENZHEN & AUCKLAND - Since the inception of computer rankings in 1975, there have been 48 three-tournament weeks on the WTA, but the one that just went by was a step above the rest - it was the first three-tournament week where all three champions were ranked inside the Top 10:

Week of December 31, 2012
Brisbane champion: World No.3 Serena Williams
Shenzhen champion: World No.7 Li Na
Auckland champion: World No.4 Agnieszka Radwanska

Only five other times in the 47 other three-tournament weeks were all three champions either current, former or future Top 10 players:

Week of February 11, 1991
Chicago champion: Martina Navratilova (current)
Aurora champion: Lori McNeil (former)
Linz champion: Manuela Maleeva-Fragnière (former/future)

Week of February 19, 2001
Dubai champion: Martina Hingis (current)
Oklahoma City champion: Monica Seles (current)
Bogotá champion: Paola Suárez (future)

Week of September 27, 2004
Hasselt champion: Elena Dementieva (current)
Guangzhou champion: Li Na (future)
Seoul champion: Maria Sharapova (current)

Week of February 14, 2005
Antwerp champion: Amélie Mauresmo (current)
Memphis champion: Vera Zvonareva (former/future)
Bogotá champion: Flavia Pennetta (future)

Week of February 25, 2008
Dubai champion: Elena Dementieva (former/future)
Memphis champion: Lindsay Davenport (former)
Acapulco champion: Flavia Pennetta (future)