American qualifier Sebastian Korda, ranked at a lowly 213 in the world, set up a possible Roland Garros last 16 clash with 12-time champion Rafael Nadal on Friday. Korda, the 20-year-old son of 1998 Australian Open champion and 1992 Roland Garros runner-up Petr Korda, defeated fellow qualifier Pedro Martinez 6-4, 6-3, 6-1 to reach the fourth round. He is the first qualifier to reach the second week in nine years and first man outside the top 200 to make the last 16 in Paris since France's Arnaud di Pasquale in 2002. Nadal, chasing a record-equalling 20th Grand Slam title, was playing his third round later Friday against Italy's Stefano Travaglia, ranked 74. dj/mw