question game

Please, does anyone knows:
How many times Guillermo Vilas did it beat Björn Borg on clay?

thanks for serious answer!!!

Twice: http://www.atptennis.com/en/players/headtohead/head2head.asp?player1=Vilas%2C+Guillermo&player2=Borg%2C+Bjorn&playernum2=B058

merci beaucoup!!!!!!!!!!!!