LONDON, Great Britain – Angelique Kerber’s win over Venus Williams in the Wimbledon semifinals presents her with an exceptionally rare opportunity – with Serena Williams awaiting her in a rematch of the Australian Open final on Saturday, she could pull off the rare feat of beating both Williams sisters at the same tournament.

Only seven players have achieved the feat before, with one of them doing it twice – full list here:

Arantxa Sánchez-Vicario
1998 Sydney
(d Serena in SFs & Venus in F)

Steffi Graf
1999 Sydney
(d Serena in 2r & Venus in QFs)

Martina Hingis
2001 Australian Open
(d Serena in QFs & Venus in SFs)

Kim Clijsters
2002 WTA Finals
(d Venus in SFs & Serena in F)

Lindsay Davenport
2004 Los Angeles
(d Venus in SFs & Serena in F)

Justine Henin
2007 US Open
(d Serena in QFs & Venus in SFs)

Kim Clijsters
2009 US Open
(d Venus in 4r & Serena in SFs)

Jelena Jankovic
2010 Rome
(d Venus in QFs & Serena in SFs)