Lionel Messi has paid an emotional tribute to Ronaldinho after his former Barcelona team-mate retired from football this week. '' I will always be grateful to you for how easy it was that you did everything to me when I got to the dressing room. I was lucky to share many things with you and I am very happy because, in addition to a phenomenon with the ball, you are a very great person and that is the most important thing. Even if you decide to leave, football will never forget your smile. All the best, Ronnie." Messi posted on Instagram.