Oscar Piastri was left fuming following the Hungarian Grand Prix after a collision with Carlos Sainz stripped him of his chance to fight for victory. Piastri, who had led the opening stint of the race from McLaren teammate Lando Norris, saw his hopes collapse after his second pit stop when he made contact with Sainz at Turn 2.

At the time of the incident, Sainz—driving for Williams—was engaged in a fierce battle with Fernando Alonso for 16th place. The collision caused Piastri to momentarily lose control of his car and lose critical seconds, allowing Lando Norris to emerge from the pits in the lead. While Norris went on to win the race, Piastri's day ended in disaster, retiring with 15 laps to go due to a gearbox failure.

Blue Flag System Failure

The incident was exacerbated by a technical failure in Formula 1's automated blue flag system, which is designed to notify lapped drivers via flashing lights on steering wheels and trackside panels. Because the system failed, race control had to rely on marshals manually waving flags and triggering panels.

Piastri did not hold back over the team radio, telling Sainz to “get out of the f—ing way you idiot” and questioning if he was “f—ing stupid or what.”

Speaking to reporters after the race, Piastri remained unimpressed: “I knew there were blue flags, but there were blue flags on all the marshal signals, I was right behind him for a sector. I couldn’t believe what happened... The fact that he didn’t [see me] and no one told him, or there was a lack of complete awareness, is unacceptable.”

Sainz Defends Actions

Sainz, who received a five-second time penalty for causing the collision, argued that the lack of dashboard alerts made it impossible to avoid the Australian while fighting Alonso. “I had no idea I was about to get lapped, and on top of that, I was in a big fight with Fernando trying to undercut him into the corner,” Sainz explained.

Sainz even suggested that Piastri should have been more cautious given the system issues: “I don’t know if he could also have been a bit more careful, given that he’s the one fighting for podiums and he positioned himself a bit more cautiously.”

Piastri dismissed this defense, noting that Sainz was fighting Alonso “like it was (for) the world championship” and added, “He’s quite critical of others... When you go and do something like that, maybe you should look in the mirror a bit.”

Addressing McLaren's strategy, Piastri clarified that his anger was directed solely at Sainz, stating that without the crash, he believed he would have remained ahead of Norris.