Successfully defending a Formula 1 world title is an incredibly difficult task, although Lewis Hamilton has managed that feat in the past two seasons.
However, more often than not in F1's history, a driver has failed to defend their title – and, on some occasions, has missed the mark spectacularly through various circumstances.
Autosport's Technical Editor Jake Boxall-Legge has five such examples of drivers who not only failed to hit the heights of the championship year, but plummeted down the pecking order dramatically.
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