Lionel Messi has some very specific rules on shirt swapping and has only asked another player once following Cristiano Ronaldo and Andros Townsend exchanging kits
What Real Madrid players have said about Zizou: Ramos, Bale, Ronaldo - Planet Football
Lionel Messi names the only player he has ever asked to swap shirts - Mirror Online
What would have happened if Lionel MESSI was playing for Madrid and Ronaldo for Barca. Who would have benefitted more, Madrid or Barca or Ronaldo or Messi? - Quora
Andrew Gaffney Ramblings from Spain.
Alex Keble, Author at Planet Football
Barcelona star Lionel Messi reveals Real Madrid legend Zinedine Zidane is the only player he's ever swapped shirts with
What would have happened if Lionel MESSI was playing for Madrid and Ronaldo for Barca. Who would have benefitted more, Madrid or Barca or Ronaldo or Messi? - Quora
FM19 sims what would happen if Lionel Messi swapped Barca for Real Madrid - Planet Football
Lionel Messi names the only player he has ever asked to swap shirts - Mirror Online