McLaren driver Oscar Piastri is targeting victory in Las Vegas on Sunday following the implosion of team-mate Lando Norris' Championship bid.

While it is still mathematically possible that Norris could catch Max Verstappen – who will secure a fourth successive title by bettering the Brit this weekend – his chances are slim.

As a result of Norris' title bid, Piastri had been under orders to prioritise his team-mate above himself. But with McLaren leading Ferrari in the constructors' championship by 36 points, it is likely focus will shift there.

"There's still some, let's say, very specific scenarios where I might be needed to help out. But for the very large majority of situations, it's back to how it was," Piastri told reporters in Las Vegas.

"The drivers' championship picture is very slim, and the constructors' championship is certainly not over for us.

"So, it's a very specific few scenarios that maybe I'll still help out if that's what I'm asked to do, but I'm going into the weekend trying to win."

Ahead of his potential coronation, Verstappen struggled on the first day of practice in Las Vegas, finishing in 17th.

Norris, meanwhile, was second-fastest behind Lewis Hamilton. Piastri finished in eighth, although bizarrely reported that his car would not turn off after reaching the pit lane, although the issue was eventually resolved.

Separately from Piastri, Norris had told reporters that – despite previous orders for Piastri to let him pass in races – the team had always come first and that would not change.

"Everything we've done, we've just swapped a position," he said.

"It benefited me because I was in the fight for the championship and that's the game we also have to play, just as I've helped Oscar in a few occasions and helped him win in Baku, you know. I did my job there.

"I think Andrea [Stella] made it very clear from the beginning that we would never do something that would make the team result worse. So no, nothing is going to change."