What happened: Lewis Hamilton criticized Ferrari team-mate Charles Leclerc's "do or die" attitude after Ferrari lost what he called a straightforward victory in Mexico City. Hamilton started on pole and moved up to second when George Russell lost momentum into Turn 1, and Leclerc then attacked him on the opening lap. Hamilton said it is in every driver's contract that they work as a team and that Ferrari did not do that.

Why it matters: Max Verstappen took the win while the Ferrari pair lost ground to each other. The incident adds to the tension already building at Ferrari after Hamilton's first pole with the team the day before.

What to watch: Ferrari's response to Hamilton's team-first comments is the next thing to follow.