One of the biggest reasons I watch F1 is due to the intensity of the rivalries between team-mates, both on and off the track . There's a saying in motorsport - "The first person you have to beat is your teammate" , which makes sense because you are matched in equipment, separated only by skill. So /r/formula1 , I want to know which of these teammate rivalries are the most intense and why (on and/or off the track)