France's golden boy Leon Marchand returns to the pool Friday seeking a fourth swimming title at the Paris Olympics while Sha'Carri Richardson launches her bid for 100m glory as track and field action gets under way. The 22-year-old Marchand has taken his home Games by storm, starting with gold in the 400m individual medley before an unprecedented double in the 200m butterfly and 200m breaststroke. Spurred on by a deafening crowd at La Defense Arena, he will chase another gold in the 200m medley, an event he won at the 2022 and 2023 world championships.