Tennis - Nadal rolls on in Sao Paulo

Rafael Nadal came from a set down to book a place in the semi-finals of the Brazil Open with a 3-6 6-4 6-4 win over Carlos Berlocq.

The Spanish world number five started sluggishly and lost the opener against his Argentine opponent, ranked 78.

Having bounced back to claim the second set, Nadal then edged a tough decider - in which he was broken early to trail 3-1 - to seal victory in two hours and 24 minutes.

''I knew there was a chance I was going to lose it, but luckily I was able to recover in the end,'' Nadal said.

''I'm very happy because it was a very difficult match against a great opponent. I'm happy to reach the semi-finals and now we'll see how it goes.''

Nadal next plays Martin Alund after the world number 111 downed Filippo Volandri of Italy 7-5 7-6(5).

The Argentine, who accounted for Jeremy Chardy in the second round, had never won an ATP match until arriving at the indoor clay-court tournament in Sao Paulo this week.

Nicolas Almagro's bid to win third straight Brazil Open title was ended by David Nalbandian, who won a lengthy three-setter 7-6(5) 3-6 7-6(3).

Second seed Almagro failed to capitalise on his chances, taking just two of 11 break points, allowing Nalbandian to go on and book a date with Simone Bolelli of Italy.

Bolelli beat Albert Montanes of Spain 6-4 6-4 to reach his first ATP semi-final since 2008

Brazil Open quarter-final results:

1-Rafa Nadal (Spain) beat Carlos Berlocq (Argentina) 3-6 6-4 6-4

David Nalbandian (Argentina) beat 2-Nicolas Almagro (Spain) 7-6(5) 3-6 7-6(3)

Martin Alund (Argentina) beat Filippo Volandri (Italy) 7-5 7-6(5)

Simone Bolelli (Italy) beat Albert Montanes (Spain) 6-4 6-4