The Argentinian won the competition multiple times with Barcelona during his two decades in Spain and will be hoping to help his new club put their name on the trophy for the first time ever.
Not only did was he a key part of several successful Barcelona teams but he also smashed a number of individual records.
Here are all of the stats you need to know about Messi in the Champions League.
How many Champions Leagues has Messi won?
Lionel Messi has won four Champions League titles, all with Barcelona.
His first medal came in 2006 as the Spanish side won the trophy for the second time in their history. Despite missing the final through injury he was named in the 22-man squad as the Barcelona beat Arsenal 2-1.
In 2009 he scored the second of Barca’s two goals as they beat Manchester United 2-0 and was on the score sheet again in 2011 when they beat the Red devils 3-1.
His final Champions League win with Barcelona came in 2015 as they beat Juventus 3-1 in the final.
How many Champions League goals has Messi Scored?
Lionel Messi has scored 120 goals in the Champions League in 149 matches since 2005.
He is second in the all time top scorers list, 14 goals behind Christiano Ronaldo of Manchester United.
Messi made his Champions League debut in the 2004-05 competition and scored his first goal in a 5-0 group stage victory over Greek side Panathinaikos.
He scored five time in the 2020-21 competition and his last Champions League goal with Barcelona came in the Last 16 against current club PSG.
How many Champions League assists does Messi have?
Lionel Messi has 36 assists in the Champions League in 149 matches since 2005.
Once again, that puts him second in the all time list behind Christiano Ronaldo who has 42.
Countryman and PSG teammate Angel Di Maria is third with 34 while Ryan Giggs is fourth with 31.
Who are PSG playing in Messi’s first Champions League game for the club?
PSG will face Club Buugge of Belgium on Wednesday, September 15, where Lionel Messi is expected to play his first Champions League match for the Parisians.
That game will kick off at 20:00 BST and is live on BT Sport//ESPN and the BT Sport app in the UK.