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#4 Lionel Messi - 121 appearances
By the age of 23, Lionel Messi accomplished what most footballers never achieve in their careers:
He made his Barcelona debut in the summer of 2005 at the tender age of 17, and in six years, by the age of 23, he had already scored 25 champions league goals.
The Argentine also had 3 Champions League trophies, 5 La Ligas titles, and 2 Club World Cups. He also holds the record for scoring the most number of goals in Europe's elite club competition by the age of 23.
The genius also bagged 3 Ballon d'Or's, an Olympic gold medal with Argentina and won the U-20 WC with Argentina before turning 23.
Only the World Cup and the Copa America elude the 30-year-old genius today, as he sits second on the all-time Champions League goalscoring chart behind Cristiano Ronaldo.
Messi is also fourth on the active list of most appearance makers in the Champions League with 121 appearances. He stands ninth on the all-time list.
