In 1971, Ickx and Ferrari started as favourites, but the championship went to Jackie Stewart with the new Tyrrell. Ferrari traditionally started the season with its full attention on the sports car championship rather than Formula One, a fact that had already caused John Surtees to leave in the middle of the 1966 season. Ickx won at Zandvoort in the rain with Firestone wet tyres, while Stewart had no chance with his Goodyear rubber. After that, he had a lot of retirements, while Stewart took one win after the other, despite Ickx giving him a good challenge at the Nürburgring once again, where both drivers shared victories from 1968 to 1973. That long and very challenging track was the favourite of Ickx, while Stewart had called it the 'Green Hell' as well as being a driving force behind the driver boycott of 1970 that urged the Germans to rework the layout of the track, which had been built in 1927. Stewart said the only thing that had changed since then were the trees growing bigger. As requested, those near the track were cut and replaced with a small run-off area, and armco. So, the Scot and the Belgian not only fought on the track, but also off the track. Stewart was constantly fighting for more safety in Formula One, while Ickx thought by doing that the challenge was taken out of the sport.