All Tennis Players How Many Grand Slams Has Flavia Pennetta Won? Flavia Pennetta (Italian pronunciation: [ˈflaːvja penˈnetta]; born 25 February 1982) is an Italian former professional tennis player.Flavia Pennetta has won 1 Grand Slam. FacebookTwitterEmail How Many Grand Slams Has Madison Keys Won? How Many Grand Slams Has Jannik Sinner Won? How Many Majors Has John Isner Won?