The Grand Prix Weekend

A conventional Grand Prix is spread across three days, and each day has a clear job. Friday is for learning the circuit, Saturday is for finding lap time, and Sunday is for racing. Nothing on Friday or Saturday morning scores a single point — yet those sessions quietly decide most races, because they are where a team turns a generic car into one tuned for this exact track.

What each session is for

In practice the engineers chase the right setup: ride height, wing angles, brake cooling, differential and suspension settings. They also run the tyres deliberately hard to measure how quickly they wear — the degradation data that shapes Sunday’s strategy. A driver might top a practice session and still be slow on race day, because practice times are run on different fuel loads and tyres.

Each session is split into two distinct jobs. A qualifying simulation is a low-fuel run on fresh soft tyres to see the car’s outright pace; a long run is a heavy-fuel stint that mimics the race to gather degradation data. When pundits say a car “looks strong on the long runs,” they mean its race pace looks better than its single-lap speed — a hint the team may be quicker on Sunday than Saturday suggests.

There are rules around the edges of all this running, too. An overnight curfew bars team personnel from working on the cars for set hours, to protect the crews from round-the-clock shifts. Teams must also hand one of their Friday practice sessions to a rookie a couple of times a season, giving young drivers real track time. Little of this scores points, but it all shapes who arrives on Sunday with the best-prepared car.