With six rounds remaining, Sebastian Vettel arrives in Sochi for this weekend's Russian Grand Prix with a 40-point deficit to Lewis Hamilton at the top of the drivers' standings. That effectively makes the race a must-win for the Ferrari driver, who has won just one race from the last five compared to Hamilton's four from the last five.
The Sochi circuit runs through the old Olympic Park used for the 2014 Winter Games and is characterised by 90-degree corners and a long pit straight. Mercedes has won every Russian Grand Prix since it was added to the calendar in 2014, but Hamilton has not won here since 2015.