Who has won more Grand Slam doubles titles, Elizabeth Smylie or Vasek Pospisil?
Elizabeth Smylie:  During her career, she won four Grand Slam titles, one of them in women's doubles and three in mixed doubles. Vasek Pospisil:  Along with partner Jack Sock, he won the 2014 Wimbledon Championships and the 2015 Indian Wells Masters men's doubles titles.
i don't know