Hamilton done second on the grid and his team-mate Jenson Button struggled too in qualifying session and he made only tenth position.
"It was definitely a bit harder for us today," Hamilton said.
"We struggled working with the tyres, we were trying really hard to get the tyres to switch on, but fortunately we had a new set in Q3 and managed to get through.
"I'm happy with performance, and surprised to see us on the front row, but we will be trying as hard as we can tomorrow."
"Fortunately I have got myself into a decent position," he said. "Long runs seemed to be OK but now it's hotter it will change things and it will be tough. We'll try to do the best job we can and maximise all we can do. I am looking forward to it."
"Of course I want to win but these guys are phenomenally quick at the moment," he said. "Not sure if we have the pace but we will wait and see tomorrow."
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