Red Bull team advisor Helmut Marko thinks Carlos Sainz is ‘without a doubt’ a ‘great’ driver but the Ferrari ace could never share an F1 garage with Max Verstappen again. Marko fully believes that Sainz was nearly on the same level as Verstappen during their time together at Toro Rosso. But Red Bull snubbed the 29-year-old when looking for Daniil Kvyat’s successor in 2016. They felt the atmosphere at the team now named AlphaTauri was ‘toxic’. Sainz and Verstappen had shared the Toro Rosso garage from their breakthroughs into F1 in 2015. Both knew it was a chance to prove they could follow Dani…