What happened: A red flag was shown at the Monaco Grand Prix after Alonso hit the wall under braking out of the tunnel, according to Chris Medland. The front-right corner touched the barrier and broke the front wing, leaving debris on track.

Why it matters: At Monaco, any debris stoppage can heavily disrupt session rhythm because the circuit is narrow and track position is difficult to recover. The incident also puts immediate repair pressure on the car before further running.

What to watch: Watch for confirmation on the extent of the damage and whether the car returns before the session ends. Race control's restart timing will determine how much running remains.