Oscar Piastri has declared he can still win the Formula 1 drivers’ championship, while his McLaren boss shut down conspiracy theories that the team would favour the Australian’s teammate Lando Norris in the final four rounds of the season.

Piastri relinquished his championship lead to Norris at the most recent grand prix in Mexico, where he finished fifth after struggling in qualifying. Since then, Jos Verstappen, the father of world champion Max, has been among those to suggest McLaren was tactically backing Piastri’s British teammate, Norris.

Oscar Piastri (second from right) arrives in the paddock at Sao Paulo with his manager Mark Webber (back left). Credit: Getty Images

Piastri, speaking ahead of this weekend’s Brazilian Grand Prix, dismissed any talk that his confidence had

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