Messi's first contract promise at 13 years old written... on a napkin, put up for sale.

The agreement in principle for a transfer of Lionel Messi to FC Barcelona written on a piece of paper in a tennis club will be offered for sale after being exhibited in New York. “ In Barcelona, ​​December 14, 2000, in the presence of MM. Minguella (club transfer advisor) and Horacio (Gaggioli, the player's agent), Carles Rexach, sporting director of FC Barcelona, agrees, under his responsibility and regardless of any divergent opinion, to sign the player Lionel Messi, on condition that we respect the agreed amounts ”, we can read on this document.