How many doubles titles do Venus and Serena have together?

As of January 2017, Serena Williams has won 23 Grand Slam singles titles and 14 Grand Slam doubles titles. She has earned 67 overall career titles.

On January 28, 2017, Williams passed Steffi Graf for the most women's Grand Slam titles (23) in the Open Era. Margaret Smith Court won 24 titles, most of them at a time when only amateurs could play in events.