"I am thinking about Doha.
"For me this is a tournament I like to play but have never had a chance to win. I'm trying to be competitive, and after the match I am hoping I will feel competitive for tomorrow [Friday]."
Uncharacteristically, teeming rain caused a two-hour delay to proceedings, before a further interruption of 10 minutes during which the two players sat on court with towels over their heads. That did not seem to disrupt Gulbis's rhythm, for he continued to hit spectacular winners, only to attempt a risky drop shot at 30-40 in the 11th game which effectively cost him the first set when it landed wide.
Gulbis then played beautifully for the first five games of the second set, dragging the match to another dimension. He broke his opponent in the second game, only for Nadal to break back in the fifth game thanks to his formidable forehand.
He then broke again, decisively, in the seventh game and saw out victory with a backhand pass struck from well behind the baseline and which touched the net on the way over.
He next plays unheralded German Peter Gojowczyk, who saw off compatriot Dustin Brown 6-3, 3-6, 7-6 (7-5). Later, a second German made the semis when Florian Mayer, the conqueror of Wimbledon champion Andy Murray, missed four match points in the second set against Victor Hanescu, of Romania, before winning 6-4, 6-7 (8-10), 6-4.
Mayer will face Gael Monfils in the last four after the Frenchman defeated Daniel Brands 6-2, 6-1.
- AAP