Dutch rider Thymen Arensman won the Tour de France’s toughest stage after a long solo effort over mammoth climbs and defending champion Tadej Pogacar increased his overall lead Saturday.

The Pas du Sant could be the key to the stage, 6km long with the last 3km as the official climb and 10% for this segment with 15% to the top. But the climbing isn’t over here, there’s a false flat and ...