Hamilton has Senna's design on his helmet
The five-time champion thinks the session was tough at the Brazilian GP.
The British pilot clocked a track record best lap in one minute and 7.281 seconds on his second run in the final session. Mercedes fights for a fifth straight teams’ title.
"The weather was going up and down. Furthermore, Ferrari is very quick this weekend, but we did a lot of work to make sure we are ready. It's great to be here in Brazil and I have Ayrton Senna's design on my helmet," he said.