After a quiet start, Piastri has impressed particularly since McLaren’s major upgrade at the Austrian Grand Prix.Piastri ran well at the British Grand Prix, with an untimely Safety Car costing him a maiden podium finish.He led the sprint race at Spa-Francorchamps before finishing second behind Max Verstappen.Norris was quick to praise Piastri but quipped that his own involvement has been a key factor.“I obviously played a huge role, no, he’s developed a decent amount but he started off on probably one of the best baselines a rookie’s ever started off on coming into F1,” Norris said at Monza.“So I think…