Lewis Hamilton believes Max Verstappen has been taking advantage of 'grey areas' in the rules to get away with escaping penalties in battles.

Speaking ahead of the Mexican Grand Prix, Hamilton said: "It’s always been a grey area, that’s why he’s got away with it for so long.

"They probably need to make some adjustments, for sure. Also, we do have inconsistencies through rulings, weekend in, weekend out, obviously depending on which years it is.

"I mean, as a sport, we do need to level up on all areas and if you look at other global sports, they have full-time refs, for example, and I’m sure that wouldn’t be a bad thing for our sport.

"I experienced it many times with Max. You shouldn’t be able to just launch the car on the inside and be ahead and then you go off and still hold your position, so they need to definitely work on this."