In just two seasons of Formula One racing, Max Verstappen has made quite a mark. He has not only changed perceptions of what is possible in motorsport's premier series, he has also changed perceptions of what is acceptable. While his overtaking manoeuvres have won awards (Verstappen is the only driver to have won the FIA's Action of the Year for three years running), his defensive driving last year prompted the governing body to rewrite the rules of on-track engagement. It's fair to say that no other new driver has had such a big impact on the sport in recent years -- and all this before he has reached his 20th birthday.