After their incredibly successful four-year working relationship, former FC Barcelona manager Pep Guardiola has revealed what he first thought when he bumped into Lionel Messi before he had seen him play.
Click through the gallery above to see some pictures of Messi and Guardiola during their time together at Barca.
In a recent interview, the 32-year-old Argentine insisted that his former manager Guardiola was pivotal to the success Barca had as a club between 2008 and 2012, and that praise has now been returned.
Guardiola, who won 14 trophies in four years with the Catalan clubs, has now admitted that he had some doubts when he first met Messi, but they disappeared as soon as he saw the player in action.
"I had already been told by someone from the squad that there was a very good player in the squad," the Spanish tactician told Catalunya Radio.
"They told me that he was very young, but scored many goals and he was very good.
"I did not know him, and one day I saw him and his father at a Nike store. I saw him, he looked small and shy, and I thought: 'Is this one as good as they say?'
"We started pre-season in Scotland, we won 6-1, 5-0 and he would score three goals a game for you. I thought that, with him, we would win everything."
Messi played 219 matches under Guardiola, scoring 211 goals and assisting a further 88 strikes.
Would you like to see Messi and Guardiola work together again one day? Let us know in the comments section below.