Reports concern Pirelli again! This time they are accused of not filing a report to the FIA that they had changed the construction of the tyres prior to the British Grand Prix.
Formula One drivers continue to complain and worry about the Pirelli tyres, and now Perez adds his thoughts after the Korean Grand Prix.
It appears that Michelin has been preparing to return to Formula One
Pirelli boss Paul Hembery claimed that "some teams went against our recommendations".
Red Bull team boss Christian Horner said the reigning world champions could be next in line for testing with Pirelli.
Horner is convinced that the 1000 kilometres of testing that Hamilton and Rosberg did in Barcelona had a direct effect on Mercedes' rapid development in the last few races.
Pirelli is replacing the 'hard' with the 'soft'.