Venus and Serena have won 13 major doubles titles together.
The German followed in Venus Williams' and Andrea Petkovic's footsteps with a 6-0, 6-0 win.
Kiki Bertens felt the wrath of the two-time champion.
Wimbledon Lookahead: Smallest group of US men since 1947
Williams was down 3-1 to qualifier Margarita Gasparyan.
On Lleyton Hewitt, symbol of the fighting spirit and the fragility of age.
Who has the inside track to the Wimbledon men's title? Our draw preview
Forty years after one of the biggest upsets in tennis, a look back at the men that made the match.
Prodigies and Wimbledon go hand in hand. Is Ana Konjuh the next teenager to go deep at SW19?