( CNN ) -- World No . 1 Rafael Nadal has continued his impressive run of form at Indian Wells with a straight-sets third-round victory over American qualifier Ryan Sweeting . The 23-year-old Spaniard has dropped just 11 points on his serve in the tournament so far , and took just 68 minutes to brush aside the world No . 105 6-3 6-1 on Monday . `` I played solid , '' the two-time winner of the Californian hard-court event , who had a first-round bye , told the official ATP Tour website . `` I think today the more positive thing is I finished much better than the beginning of the match . In general I 'm happy . '' The nine-time grand slam champion will meet world No . 84 Somdev Devvarman in the fourth round , after the Indian qualifier secured just his third win in a Masters event with a 6-1 3-6 7-6 ( 7-5 ) victory over Belgium 's Xavier Malisse . Djokovic and Federer through to third round . `` I have a lot of respect for Nadal , '' the 26-year-old said . `` He 's one of my favorite tennis players , one of my idols , so when I 'm out there I 'm gon na do everything I can to win the match . I 'm gon na compete as hard as I can . '' It was not such a good day for Swedish world No . 4 Robin Soderling , who made a shock exit from the tournament after being beaten by Germany 's Philipp Kohlschreiber . Two-time French Open finalist Soderling failed to convert five set-points in his 7-6 ( 10-8 ) 6-4 loss to the world No . 35 , who inflicted just his second defeat of the season . Next up for Kohlschreiber will be the rejuvenated former world No . 4 and 2009 U.S. Open champion Juan Martin del Potro . The 90th-ranked Argentine , who spent much of last season sidelined with a wrist injury , continued his comeback with a 7-6 ( 7-3 ) 6-3 victory over Australian Open quarterfinalist Alexandr Dolgopolov of the Ukraine . The United States ' Sam Querrey also caused an upset by easily beating Spanish world No . 9 Fernando Verdasco 7-5 6-4 . The 24th-ranked Querrey will face another Spaniard Tommy Robredo in the last 16 , after the world No . 28 cruised to a 6-0 6-4 win over American Donald Young -- who eliminated fifth seed Andy Murray in the previous round . In other third-round results , Spain 's Albert Montanes beat compatriot and world No . 12 Nicolas Almagro 4-6 6-2 6-4 . He will next face big-serving Croatian Ivo Karlovic , who knocked out France 's Gilles Simon 6-3 6-3 .
Rafael Nadal eases into last 16 at Indian Wells by beating U.S. qualifier Ryan Sweeting . Two-time champion meets Indian qualifier Somdev Devvarman for a quarterfinal spot . Robin Soderling suffers surprise defeat to German world No . 35 Philipp Kohlschreiber . Juan Martin del Potro , Sam Querrey and Tommy Robredo also progress to round four .