Charles Leclerc and Lewis Hamilton line up fourth and fifth for Sunday's United States Grand Prix, and the Ferrari teammates say they know where the limit is when the lights go out. Both have crossed it before. At Monza in September, Hamilton lunged inside Turn 1, Leclerc squeezed him off at Turn 2, and the seven-time champion dropped to tenth while Leclerc crashed out on lap two. Hamilton fumed that "there are no rules," and Leclerc admitted they'd gone too far. Now, heading into COTA's uphill run to Turn 1, Leclerc insists no team orders are needed—just awareness. "We know what is the line not to cross," he said. "We've crossed it, Lewis crossed it, and we don't want to see that." Ferrari can't afford another Monza. With the constructors' fight tightening, the last thing the Scuderia needs is its drivers colliding in Texas.

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