The 'King of Clay' has done it again.Rafael Nadal,... who is virtually unbeatable on clay, won his 12th French Open title on Sunday at Roland-Garros in Paris.The 33-year-old Spaniard defeated Dominic Thiem in four sets: 6-3, 5-7, 6-1, 6-1.His latest victory gives him a career total of 18 Grand Slam titles.He now trails Roger Federer and the all-time men's record by just two titles.