Piquet ran second behind Senna .
Piquet set the fastest lap of the race on lap 41 , but with a pit stop ten seconds quicker than Piquet 's , Senna was able to retain the lead .
Running second behind Senna , Piquet set the fastest lap of the race on lap 41 , but with a pit stop ten seconds quicker than Piquet 's , Senna was able to retain the lead .