Ferrer battles into semis

Top seed David Ferrer survived a scare to reach the semi-finals of the Heineken Open with a 6-3 5-7 6-4 victory over Guillermo Garcia-Lopez.

World No 3 Ferrer, a four-time champion at the event, looked to be cruising to a routine victory as he went a set and a break up against his fellow Spaniard.

But Garcia-Lopez fought back to turn the second set around completely before Ferrer finally took a decisive lead in the third after the pair had traded breaks again.

"He played unbelievable tennis. I'm very tired now," Ferrer said after the match.

Ferrer will face Yen-Hsun Lu in the last four after the Taiwanese player defeated America's Steve Johnson 6-4 6-4.

The other last-four clash in Aukland will see third seed John Isner take on another Spaniard, Roberto Bautista-Agut.

Isner emerged victorious after a back-and-forth battle with Phillipp Kohlschreiber which lasted two hurs and 25 minutes and ended 6-7 (4-7) 7-6 (7-4) 7-6 (7-5) in the American's favour. Bautista-Agut beat Jack Sock 6-1 6-3.

"I was up against a gutsy opponent so I knew I have to give it everything I had," Isner said.

"It wasn't necessarily pretty for either of us but when you're playing guys as good as him it comes down to a point here and there. I got a bit lucky today."