McLaren's Lando Norris set the pace in a floodlit second practice session at the Singapore Grand Prix on Friday with Ferrari's Charles Leclerc close behind but Red Bull's championship leader Max Verstappen only 15th.

The FIA intervenes following intense scrutiny of McLaren's controversial rear wing design, which rival teams claim breaches aerodynamic regulations.

Norris and Piastri have combined to win two of the last three F1 races for McLaren, while Verstappen hasn't won since the Spanish Grand Prix on June 23. While the team has said it wants Norris to dethrone Verstappen, Brown knows it is a longshot unless Norris can start sledgehammering-away large chunks of Verstappen's lead every race.