Avantist reveals their limited edition masterpieces on the sidelines of the WTA Finals. Limited to only 30 pieces, each one contains a piece of string from the racquet used by Martina Navratilova to win the 1987 Wimbledon Singles Final. A big congratulations to @keeranj and team ??? #avantist #titanium #watches #limitededition #wtafinals (photo courtesy of Avantist)