Konstantinos Sofiakis, a Grade 6 student at Athens College Elementary School, participated in the following water polo events with his team:

• The European Splash Water Polo Tournament, held in Volos, from April 16 to 19, 2026. His team placed 1st, and he emerged as the team's top scorer.
  
  
• The Greek National U12 Pro Mini Water Polo Championship, whose final round was held at the Ilioupoli Swimming Pool from June 26 to 28, 2026. His team placed 2nd, and he was again the team's top scorer.