Cyril Abiteboul branded car Newey a ' liar ' after post - Melbourne comments . Newey accused motor Bull 's engine supplier team of failing to engage with the team to find a solution to their difficult start to the campaign . Christian Horner said the Renault engine was falling short of Mercedes . Abiteboul will appear alongside Horner at a press conference on Friday . He also mischievously posted a pair of boxing gloves and boots .
Cyril Abiteboul called Adrian Newey a 'liar ' after post-Melbourne comments . Newey accused Red Bull's engine supplier Renault of failing to engage with the team to find a solution to their difficult start to the campaign . Christian Horner said the Renault engine was 100bhp short of Mercedes . Abiteboul will appear alongside Horner at FIA press conference on Friday . He also mischievously posted a pair of boxing gloves and boots .