Kimi Antonelli secured a dominant victory at the Belgian Grand Prix for Mercedes, extending his world championship lead after teammate George Russell crashed out on the opening lap.
The teenage rookie held his lead from pole position into the first corner at La Source.
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Max Verstappen briefly took the lead down to Eau Rouge, but Antonelli reclaimed it at Les Combes as chaos unfolded behind him.
George Russell retired after a collision with Ferrari's Lewis Hamilton at Les Combes.
Russell had lost positions on the Kemmel straight and attempted to pass Hamilton on the outside, but Hamilton lost front-end grip and slid into the Mercedes.
Stewards handed Hamilton a five-second penalty for causing the collision.
The retirement is another setback in a difficult season for Russell, who previously suffered an electrical failure while leading in Montreal and a pit lane speeding penalty in Monaco.
"I just got totally swallowed up down the straight," Russell said. "The incident was a racing incident.
Maybe I could have gone a bit wider, maybe he could have braked a bit more."
"I am numb to the disappointment. When it happens so often you just get used to it," he added.
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The victory is Antonelli's sixth win of his sophomore season, adding to successes in China, Japan, Miami, Canada, and Monaco.
The 19-year-old Italian now holds a 50-point lead over Russell in the championship standings.
Antonelli briefly lost the lead on lap 19 during a virtual safety car period that allowed Charles Leclerc to make a cheaper pit stop.
Leclerc emerged with a 2.6-second advantage, but Antonelli erased it with rapid laps and overtook the Ferrari within 10 laps.
Hamilton served his five-second penalty during his pit stop, during which he struck a mechanic upon release.
The mechanic escaped injury, but the incident triggered a post-race investigation for an unsafe release.
Oscar Piastri finished fifth for McLaren, while teammate Lando Norris recovered from 13th on the grid to seventh.
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Hamilton crossed the line fourth pending his post-race investigation.