Rafael Nadal defeated which 19-time Grand Slam titlist in the 2008 French Open for his fourth straight clay major title?
2008 French Open – Men's Singles Rafael Nadal was the 3-time defending champion and retained his title, defeating Roger Federer in the final 6–1, 6–3, 6–0. This was Federer's worst loss in a Grand Slam event in his entire
2013 Western &amp; Southern Open – Men's Singles Roger Federer was the defending champion, but was defeated in the quarterfinals by Rafael Nadal who went on to win his first ever Cincinnati Open title and record-extending 26th ATP World Tour Masters 1000.