Max Verstappen played it cool as speculation swirled around his Formula One future on Thursday, with Red Bull's four-times world champion saying it was not on his mind and he was 'very relaxed'.

Formula 1 champion Max Verstappen said he feels “very relaxed” amid speculation about his future with Red Bull, though he acknowledged on Thursday there is frustration within the team. Red Bull motorsport adviser Helmut Marko had raised concerns after last weekend's Bahrain Grand Prix that Verstappen could reconsider his future with the team if it couldn't provide a car capable of fighting for the title.