ATP World Rankings: Top 5 remains unchanged, Wawrinka up to No. 9

There was very little change in the top 10 of the ATP World Rankings this week, with most of the world's best players taking a break. 

Rafael Nadal and Kei Nishikori were the only two members of the top five to play this week, though they had drastically different results. Nadal bowed out in the third round of the Barcelona Open, his worst result at the tournament since taking part as a 16-year-old in 2003.

Nishikori on the other hand defended his title in Barcelona, winning on the clay court for the second year in a row.

The only real movement in the top 10 was Stan Wawrinka jumping one spot from No. 10 to No. 9, switching places with Marin Cilic. 

Martin Klizan jumped four spots to No. 24 after reaching the semifinal in Barcelona, while Guillermo Garcia-Lopez's victory in the Nastase Tiriac Trophy final saw him rise 14 spots to No. 31. The biggest jump in the top 50 belonged to Pablo Andujar, who moved up 24 spots to No. 42 after losing to Nishikori in the final in Barcelona.