Senna convincingly beats Alain Prost with 74% of the vote. The Brazilian now faces the next four time champ - Sebastian Vettel.
For those new to this series, here is how it works. We started with those drivers who won a single championship, working through them chronologically. The winner of single champions will then face double champions, then triple etc... By the end of the series you will have voted for your champion of champions!
Remember you vote for the driver who you think would win in a One vs One situation.
The winner of this round will face Lewis Hamilton in Round 30.
Who gets your vote? #KnockoutF1