Lewis Hamilton has been warned his ongoing row with the FIA over their jewellery clampdown "could get very nasty quite quickly".
New FIA race director Niels Wittich has taken a strong stance on jewellery, with the organisations rules stating: "The wearing of jewellery in the form of body piercing or metal neck chains is prohibited during the competition and may therefore be checked before the start."
Speaking before the Miami Grand Prix, Hamilton labelled the move a "step backwards" for the sport and even went as far as to say: "If they stop me, then so be it. We've got a spare driver."
