Red Bull 's Sebastian Vettel says the season will not be as quick as last year . The German has won the world championship in each of the last three seasons . Vettel has set his sights on a record - equaling third drivers ' title in a row . `` Twenty races is indeed a huge workload but to be honest whether it 's 19 or 20 races does n't make any real difference . The 24-year - old says the sport will not expand beyond a full season .
Red Bull 's Sebastian Vettel says the season will not be as quick as last year . The German has won the world championship in each of the last three seasons . Vettel has set his sights on a record - equaling third drivers ' title in a row . The 24-year - old says the sport will not expand beyond a full season .