Messi set a new one-club goals record after netting for the 644th time – the Barca captain surpassing Pele's haul in Tuesday's 3-0 LaLiga victory at Real Valladolid.
Six-time Ballon d'Or winner Messi, who matched Pele against Valencia on Saturday, scored his 451st LaLiga goal as Barca eased past Valladolid.
Messi used social media to react to the historic feat after Pele had tallied 643 goals in an 18-year career at Brazilian club Santos.
"When I started playing football, I never thought I would break any records," Messi wrote on Instagram. "And even less the one that I achieved today that @pele had...
"I can only thank everyone who helped me over the years, my team-mates, my family, my friends and everyone who supports me every day. Hug!!"
Messi's 644 goals have come across 17 seasons and 749 games for Barca, where the 33-year-old debuted in 2004.
His effort against Valencia made Messi the first player to reach the 450 milestone for a single club in any of Europe's top five leagues.