What happened: Mercedes faces another grid drop for George Russell at November's Las Vegas Grand Prix. He finished ninth in Singapore after component changes sent him to the back.

Why it matters: The pool tightened after his Sepang retirement forced an engine change. Another back-row start in November leaves Mercedes chasing points with few races left.

What to watch: Watch for Mercedes to confirm the exact components closer to Las Vegas. The final grid slots in after qualifying penalties apply.