Rosberg in rare company

Nico Rosberg joined an ultra-select group of Formula One drivers with his seventh win in a row for Mercedes at the Russian Grand Prix on Sunday, but the German will remain the odd man out for some time yet.

Only four drivers since the championship started in 1950 have won seven races in a row and only four have triumphed in the first four rounds of a season.

Just one - Rosberg's compatriot Sebastian Vettel - won more than seven in a row when he chalked up nine for Red Bull in 2013 en routed to his fourth championship.