There are several people who are debating about the most popular game in the world. Many people may argue that American football or basketball is the most popular one. But those who are doing arguments on those will be highly opposed by football lovers.
Speed and agility are two very important qualities for any athlete, especially if we talk about football. Both qualities are different but closely related. Speed can make you leave defenders behind or reach faster forwards. Agility makes you dodge defenders' limbs more easily to score a goal or get the ball if you are the goalkeeper.