Watch: Cristiano Ronaldo taunts Messi on Instagram?
In the background of Ronaldo’s picture, in fact, there is a t-shirt with the written ‘GOAT’ printed on it. GOAT is the acronym for ‘Greatest of all times’ and is a word used by Messi in a
commercial that went viral before the beginning of the World Cup.
GALLERY: Latest Instagram posts of Cristiano Ronaldo