He is also set to wear the No30 shirt in Paris - the number he wore when he made his professional debut against Espanyol in October 2004.
That's what hurts the most.
Neymar slipped the ball to his former Barcelona teammate and the Argentine did the rest, curling an unstoppable effort beyond Leca for 1-0 68'.
The Argentine delivered 13 assists, though, but the attacking trio he formed with Kylian Mbappe and Neymar clicked only deep into the season, and after the Champions League exit.
However, claims that Messi is set to remain at the club for at least one more year, and the French champions are prepared to build the team around the Argentina international.
Messi, who joined amid much fanfare as a free agent from Barcelona, has had a lacklustre season, scoring only four goals in Ligue 1 in 22 appearances.