“Great strategy from Mercedes,” he told Auto Bild. “Valtteri did a great job for them by knocking out both of our cars.
“He gets the penalty for the next race, but he makes up for that in two laps at Spa,” he added. “It’s not a real punishment.”
“It [the grid penalty] doesn’t repair the damage he did to us,” Horner continued, “especially when you look at the budget cap. The effects are immense, the costs are brutal.
“The first impressions indicate that Perez’s engine is no longer operational either.
“It’s very frustrating, also for Honda, because it doesn’t come from reliability, but from accidents that we did not cause.”
The stewards later explained that the wet conditions meant they were more lenient towards Bottas and Lance Stroll, who made a similar mistake behind.
Looking ahead to Spa, a key battle will be over wing levels and who can optimise Sector 1 and Sector 3 without losing out in the middle.