<p>Novak Djokovic survived a major scare from teenager Lorenzo Musetti on Monday to reach a 15th French Open quarter-final and stay on course to become the first man in over 50 years to win all four Grand Slams twice.</p>.<p>The world number one dropped the first two sets, then comfortably levelled before the 19-year-old Italian retired in the final set.</p>.<p>Djokovic's 6-7 (7/9), 6-7 (2/7), 6-1, 6-0, 4-0 win set up a last-eight clash with Matteo Berrettini, another Italian, who progressed after Roger Federer's withdrawal.</p>.<p>Djokovic, the 2016 champion and chasing a 19th major, was facing his earliest exit in Paris since 2009 when 19-year-old Musetti stormed through the first two sets, hitting blistering winners and finding the acutest of angles.</p>.<p>But the 76th-ranked Italian, making his Grand Slam debut, then went dramatically off the boil.</p>.<p>Where the first two sets had taken 75 and 66 minutes, Djokovic swept the third in 24 minutes and the fourth in just 17.</p>.<p>Musetti won only 14 points in the third and fourth sets before leaving the court for a medical time-out.</p>.<p>Djokovic broke for 1-0 in the decider, injuring a finger as he smashed a winner while losing his balance and falling into the clay.</p>.<p>Musetti gamely fought on but after being broken twice again, he called it quits.</p>
<p>Novak Djokovic survived a major scare from teenager Lorenzo Musetti on Monday to reach a 15th French Open quarter-final and stay on course to become the first man in over 50 years to win all four Grand Slams twice.</p>.<p>The world number one dropped the first two sets, then comfortably levelled before the 19-year-old Italian retired in the final set.</p>.<p>Djokovic's 6-7 (7/9), 6-7 (2/7), 6-1, 6-0, 4-0 win set up a last-eight clash with Matteo Berrettini, another Italian, who progressed after Roger Federer's withdrawal.</p>.<p>Djokovic, the 2016 champion and chasing a 19th major, was facing his earliest exit in Paris since 2009 when 19-year-old Musetti stormed through the first two sets, hitting blistering winners and finding the acutest of angles.</p>.<p>But the 76th-ranked Italian, making his Grand Slam debut, then went dramatically off the boil.</p>.<p>Where the first two sets had taken 75 and 66 minutes, Djokovic swept the third in 24 minutes and the fourth in just 17.</p>.<p>Musetti won only 14 points in the third and fourth sets before leaving the court for a medical time-out.</p>.<p>Djokovic broke for 1-0 in the decider, injuring a finger as he smashed a winner while losing his balance and falling into the clay.</p>.<p>Musetti gamely fought on but after being broken twice again, he called it quits.</p>