Whilst it's been in use for many years, the phrase was popularised from the twentieth century by heavyweight boxing champion Muhammad Ali, who, in 1964, declared himself "the greatest" right after defeating Sonny Liston. Under are the 10 contenders during the race for the greatest football gamers ever​. Don't forget, https://messiahdhjkl.madmouseblog.com/20509904/about-what-is-goat-in-football