The Brazilian, who is currently playing back home in Gremio, appeared to have an almost endless wardrobe of worn kits from his playing career.
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The 36-year-old joined Liverpool in 2007 from Gremio, and spent a decade with the Reds before a five-year stint with Italian side Lazio.
After a difficult start on Merseyside, Lucas became a cult hero, helping the team evolve back into one of the world's best under Jurgen Klopp.
In doing so, he was able to face off against some of the greatest players to ever play the game, and take their jerseys home with him.
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Captioning clips of his son, Pedro, on Instagram, Lucas wrote: "Today he asked to see some shirts that I swapped or won from friends!"
Going through a number of Chelsea and Manchester City Premier League legends including Frank Lampard and Yaya Toure, the youngster surprisingly seemed to be most impressed by former City striker Felipe Caicedo, who later joined Lucas at Lazio.
Pedro also showed his impressive football knowledge, knowing the Man City shirt of Fernando was from the current Sevilla midfielder, and that Alberto Moreno is currently at Villarreal.
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He also knew a nameless number 14 Argentina shirt was from Javier Mascherano, and recalled Juan Roman Riquelme, despite the midfield icon being well before his time.
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He did make one slip-up, though, when he saw an Arsenal shirt with the number 19 and Gilberto on it, and guessed 'Gilberto Paulista?'
Presumably meaning former Gunner Gabriel Paulista, Lucas was quick to correct, saying: "Gilberto Silva! Champion of the world!"
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After a number of great shirts, including those of Lionel Messi and Xabi Alonso, which delighted the youngster, he looked slightly baffled to see a no.45 AC Milan top.
"[Mario] Balotelli?" he asked. "Played for Liverpool?"
The biggest surprise of all, though, was his delight at seeing a Simon Mignolet shirt, presumably growing a fondness for the goalkeeper when he played at Liverpool with his father.