Max Verstappen has suggested that he has some ‘disagreements’ with Christian Horner in their time working together, but has pleaded with Red Bull to ‘keep the key players’ together. The three-time world champion has been caught in the middle of a bitter behind-the-scenes row at Red Bull with his father, Jos, calling for Horner to step down in relation to his recent investigation. Verstappen Jnr had previously relented from siding one way or the other, pushing instead to try and focus on the race weekend. But questions over Horner’s future at Red Bull have continued heading into the Australian …