What happened: Mercedes driver Kimi Antonelli officially began his Monaco Grand Prix weekend by taking to the track for FP1. The championship leader showcased a new custom helmet design as he acclimated to the tight confines of the street circuit.

Why it matters: Antonelli enters the weekend with a 43-point lead over teammate George Russell and is hunting for a fifth consecutive victory. Success in Monaco would further solidify his title charge following his maiden F1 win in China earlier this season.

What to watch: Teams will transition to FP2 later today to finalize setups before Saturday's critical qualifying session.