Stewart hails Clark, 50 years on from fatal crash

Formula One F1 - Brazilian Grand Prix 2017 - Sao Paulo, Brazil - November 12, 2017 Jackie Stewart with fans after the race REUTERS/Ueslei Marcelino

LONDON (Reuters) - Jackie Stewart has only ever had one answer when asked who was the finest driver he raced against in Formula One: Jim Clark.

Saturday is the 50th anniversary of the death of one of the sport's all-time greats, in a Formula Two crash at Germany's Hockenheim circuit on April 7, 1968.