Verstappen unhappy with Pirelli blowout explanation 18 Jun 2021 / 10:00 H. LE CASTELLET: Formula One world championship leader Max Verstappen (pix) said on Thursday he was unhappy with Pirelli’s explanation for the high-speed tyre blowout that cost him victory at the Azerbaijan Grand Prix. Red Bull’s Verstappen suffered a left-rear failure on the straight while leading towards the end of the June 6 race in Baku. Aston Martin’s Canadian Lance Stroll had earlier crashed out with a similar failure. Sole supplier Pirelli on Tuesday ruled out any production or quality defects and accepted the teams had followed prescribed parameters when the tyres were fitted.