1. Vettel Singapore
If the failures in Malaysia and Japan were the final nails in the coffin, the death blow to Vettel’s and Ferrari’s title dream can be said to be Singapore.
In a race where he was on pole and his rival down in P5, Vettel made a poor start and tried to box in Verstappen. The move ended up with a big clash on turn one with Raikkonen involved and it put Vettel out of the race.
Worst, his rival went on to win the race. Vettel had killed his own title hopes and that clash tops the list of most disappointing Formula 1 moments of the entire season.