Argentina lost 1-0 to Spain in the showpiece after Ferran Torres netted an extra-time winner for La Roja, who lifted the trophy for a second time (also in 2010).

Messi became just the second ever player to play in three men’s World Cup finals (also 2014 and 2022), after Brazil’s Cafu (1994, 1998, 2002).

At 39 years and 25 days, Messi is also the second-oldest World Cup finalist after Italy’s Dino Zoff in 1982 (40y 133d).

Argentina was far from its best against Spain, recording just two shots in the 120 minutes of action, the first of which came from Messi in the 117th minute.

Messi admitted it will take time to get over the loss, but was proud of Argentina's World Cup campaign this summer, nonetheless.

"The pain is immense and it will take time for this wound to heal," Messi wrote.

"But I also cherish all the good... The matches we turned around, giving our all, which will forever remain in our memories, the support of an entire country that, together with the hard work and effort of this group, led us to be, once again, among the best in the world.

"Thank you so much from the bottom of my heart for every greeting and every message. Once again, we managed to unite as a country and be together, sharing the immense pride of being Argentinian.

"I also want to congratulate Spain on the championship."

Messi finished second in the Golden Boot race, scoring eight goals to Kylian Mbappe's 10, while they both assisted four times.

The Frenchman is also the leading scorer in World Cup history, despite Messi being the first to break Miroslav Klose's record this summer.

Messi did not reveal whether he would immediately retire from international duty, but featuring at another World Cup seems unlikely for the 39 year-old.