Giorgos Mpouskos, a student of Athens College High School 1, competed in the following championships:

• The Panhellenic Tennis Tournament E3 for Boys U16, held in Ilioupoli, from October 18-21, 2024, 42nd week (IA), and won 3rd place in singles.
• The Panhellenic Tennis Tournament E3 for Boys U16, held in Ilioupoli from March 14-17, 2025, 11th week (IA), and won 1st place in singles. 
• The Panhellenic Tennis Tournament E3 for Boys U16, held in Chalkida from May 2-5, 2025, 18th week (Θ), and won 1st place.
• The TEN-PRO International Tennis Tournament, held in Budapest from June 28 - July 4, 2025, where he earned 1st place.
  
• The Panhellenic Tennis Tournament E2 for Boys U16, held in Drama, 30th week (Union A) from July 26-30, 2025, where he earned 1st place in the doubles and 3rd place in the singles.