What happened: McLaren and Mercedes have debuted new rear wings ahead of the Monaco GP, according to Sky Sports F1. The changes arrive before running at one of F1's lowest-speed, highest-downforce circuits.
Why it matters: Rear-wing choices can be especially visible at Monaco, where teams prioritize grip and cornering stability over straight-line speed. The update also adds another layer to the constructors' fight involving McLaren and Mercedes.
By the numbers: Wire Report's June 4 coverage had Mercedes 113 points ahead of McLaren in the F1 Constructors' Championship.
What to watch: Watch Friday practice and qualifying pace to see whether the new wings translate into usable lap time. Scrutineering and rival reactions could also shape the weekend narrative.