Oscar Piastri admits that dreaming about standing on further podiums in Formula 1 can ‘very easily’ become ‘demoralising’ for the McLaren driver instead of beneficial. The 22-year-old enjoyed a brilliant rookie campaign last year after graduating to F1 after one season on the sidelines. Piastri became the first rookie to make multiple Grand Prix podiums since Lewis Hamilton in 2007. Both drivers also realised the feat after debuting for McLaren. Piastri enjoyed his maiden top-three finish at the Japanese GP last September, behind race-winner Max Verstappen of Red Bull plus McLaren teammate Lan…