However, the talented young Americans' recent reunion at Wimbledon - where they practiced together - was not a happy one. During qualifying Duval was diagnosed with Hodgkin's lymphoma, which was confirmed after returning home for further tests.
Townsend was one of many players to tweet their support and has also stepped in to fill her friend's place on the Philadelphia Freedom's World TeamTennis line-up.
Im sending love, prayers, and light towards one of my best friends @vicky_duval95 .. I love you girl, and I know you will be fine!! Xoxo