Siblings that have met in a major Tennis Final
As of 2015 it has only happened twice - in 1890 in the fourth edition of what is now the US Open with Ellen and Grace Roosevelt, President Franklin D Roosesvelt's cousins. Ellen beat Grace. In 2001 at the US Open with Venus and Serena Williams. Venus beating Serena. The Williams sisters went onto a further 7 grand slam finals, with Serena winning all 7.