Max Verstappen admits his record-equalling ninth victory in a row was stressful as he had to deal with challenging weather conditions to win the Dutch Grand Prix. Rain just as the race started meant the field was faced with a wet track in the final sector on the opening lap, but Verstappen stayed out on slick tires for an extra lap before pitting and was over 14s behind teammate Sergio Perez — who stopped immediately — by the time he’d taken on intermediates. Then a late downpour saw a red flag and Verstappen face pressure from Fernando Alonso, but he…