Nervous Nadal into ATP Buenos Aires quarters

Top-seeded Rafael Nadal overcame some uncharacteristic nerves to surge into the quarter-finals of the ATP Argentina Open with an efficient 6-4, 6-0 victory over Argentine qualifier Facundo Arguello.
Nadal, ranked fourth in the world, on Wednesday needed just 64 minutes to win his opening match in the clay court tournament, booking a clash with Federico Delbonis.
The Spaniard's 714th career win gave him sole possession of 10th on the all-time list in the Open Era, ahead of Boris Becker.
Nadal admitted he felt a few nerves opening his Buenos Aires campaign after a semi-final loss to Italian Fabio Fognini in Rio last week.
"It's never easy to open when you have lost a match like the one I lost in Rio de Janeiro," he said. "I started a little nervous, and Arguello played very well in the first set.
"In the second I felt more comfortable and I was able to attack more."
Nadal's loss to Fognini -- which ended a run of 52 straight semi-final clay court wins stretching back 12 years -- saw the Spaniard drop from third to fourth in the world, the first time he hasn't figured in the top three since August 2013.
This week he's trying to reassert his dominance on clay. He is one clay court title away from Guillermo Vilas' record of 46 triumphs on the surface.
Delbonis, in a re-match of last year's Sao Paulo final, once again triumphed over Italian Paolo Lorenzi with a 6-4, 6-2 win.
Third-seeded Pablo Cuevas reached his third straight quarter-final with a 7-6 (7/4), 6-1 win victory over Guido Andreozzi.
Cuevas produced seven aces to beat the local wild card. He will next face hometown favorite Juan Monaco, who upset fellow Argentine and fifth seed Leonardo Mayer 6-4, 6-4.
Source: AFP