The Formula 1 season ended on Sunday with a third consecutive victory for Mercedes driver Nico Rosberg, but it is important to remember how the year started.

There are now questions about just why Rosberg has hit this rich vein of form, but it has come at the end of a year that was owned outright by his team-mate Lewis Hamilton.

Unlike in 2014, when he retired from the first race of the season, Hamilton won in Australia in March and built up from there a momentum to which Rosberg had no answer.

The German had his moments but, generally speaking, Hamilton was in complete control of the season from Melbourne until he won the title in Austin in October with three races still to go.

It was the Lewis Hamilton show, and Rosberg was left looking punch drunk on the ropes.

Even when Hamilton made a mess of the first lap in Hungary and then made another important mistake later on in the race, Rosberg was unable to capitalise.

There was a point that afternoon when, had the positions remained as they were, Rosberg would have gone into the summer break leading the championship.