Athens College High School junior Giorgos Haidemenos competed in the PanHellenic Junior Tennis Championships U16 that took place at the Olympic Athletic Center of Athens (OAKA) between the 1st and 8th of August 2020.  He took 1st place in the U16 mixed matches.

He also placed 1st in the doubles and 2nd in the singles, category M16, of the 4th E1 PanHellenic Tennis Championship that took place on September 12, 2020 in Aridaia.