Formula 1 and IndyCar both have problems with their marquee events, but for wildly different reasons.

Cian and Tom analyse why the huge success of the Indy 500 is a detriment to the wider series, and how the Monaco Grand Prix risks getting left behind if it does not modernise for today's Formula 1.

The team also look at the decision to move the MotoGP British Grand Prix back to August after an unsuccessful experiment to hold the event earlier in the season.

Meanwhile, Nascar's debut on Prime Video represents a new frontier for the series after a quietly impressive showing during the Fox segment of the new broadcast deal.