Red Bull team principal Christian Horner believes rival team Mercedes is clearly favouring Lewis Hamilton over Valtteri Bottas this year.
Hamilton is on target to match Michael Schumacher's record of seven world titles if he continues on his current trajectory this season and is also likely to beat Schumacher's all-time career win record of 91 victories.
Such is Mercedes' advantage over the rest of the field this season that Hamilton has won five of the seven events so far, with Bottas taking one victory in Austria and Red Bull's Max Verstappen scoring a win in Great Britain.