Max Verstappen has admitted he ‘refuses to believe’ what Christian Horner has said about Red Bull after failing to win back-to-back races for the first time in two years. The team from Milton Keynes have dominated the pinnacle of motorsport over the past two seasons. Only Carlos Sainz could deny Red Bull a Grand Prix win in 2023 as the Ferrari star took glory at the Singapore GP. But the Spaniard, McLaren and Mercedes have won this year. Mercedes have even topped the last two podiums with George Russell’s fortuitous victory at the Austrian GP and Lewis Hamilton’s record ninth British GP win. V…