Which tennis player primarily plays doubles, Jonathan Erlich or Serena Williams?
Jonathan Erlich: Jonathan Dario "Yoni" Erlich (Hebrew: יונתן דאריו "יוני" ארליך‎ ‎ , born in Buenos Aires, Argentina, April 5, 1977) is a professional Israeli tennis player. Jonathan Erlich:  He plays doubles, primarily. Serena Williams: Serena Jameka Williams (born September 26, 1981) is an American professional tennis player.
Jonathan Dario "Yoni" Erlich