Haas boss Gunther Steiner fears that team orders may now be the only way to stop his Formula 1 drivers Romain Grosjean and Kevin Magnussen crashing into each other.
Despite the pair having been warned once again ahead of the German Grand Prix to avoid trouble after their collision in Britain, the pair still banged wheels once more.
Having hoped that his drivers would have learned from incidents this year, which included a clash at the Spanish GP, Steiner now says he must take action to ensure there are no repeats.
Asked by Autosport if stopping his drivers racing each other was now the only option, as did Force India did with Sergio Perez and Esteban Ocon after their 2018 collisions, Steiner replied: "I need to think about it but there are not many options.
"I think at some stage something needs to be done. I normally try to avoid it - as you guys know, I like racing, I think that's what we should be doing.
"But if it works always against us, I can't keep it happening.
"We got lucky that nothing happened, that they both were there, but it could affect them again."
Steiner said following the collision at Hockenheim he intervened in telling Magnussen to concede the place to Grosjean, who at that stage of the race was faster.
The pair went on to finish seventh and eighth, with Grosjean ahead.
Asked why he had not given the order sooner, when Grosjean was closing in fast, Steiner said: "It wasn't so obvious, and again - why you don't run into any other car?
"Common sense needs to come in play here. If I have to take every overtake manoeuvre, call it myself, then I'd better go and drive myself. And that will not be quick."
Steiner said the aggravation being caused by the tension between his drivers was especially annoying amid the team's ongoing battle to understand its car.
"It's a headache, yeah," he said. "It doesn't help to find a solution, doesn't help to be always constructive.
"You're thinking about things I shouldn't be thinking about. I should be thinking about everything else.
"There's a lot going on, and the more you can focus on your real issue, the better it would be.
"But you can't keep on, every race, running into each other. It's getting old."