Toto Wolff Q&A: Constructors' title means so much to Mercedes

For much of the season it has been a question of 'when' and not 'if' Mercedes would wrap up their first constructors' title, and on Sunday in Sochi they finally did just that by way of their ninth one-two finish of the season.

After the race, Mercedes' head of motorsport Toto Wolff spoke of his delight at the team's success and explained why he expects the battle for the drivers' championship to run and run