Having started the season as third choice centre back behind Rodrigo Moledo and Giorgos Koutroubis, the Larissa born defender has gradually earned the trust of Marinos Ouzounidis to become a starter at the expense of the latter.

Signed by Marinos Ouzounidis in the summer of 2017 on a free transfer from AEK, Kolovetsios has drastically improved under Giorgos Donis, earning a call up to the Ethniki squad along the way as a reward for his efforts.

[10] On 1 July 2020, with two minutes left Kolovetsios rose highest to score after a corner delivered by Giannis Bouzoukis, in a 2–0 home win game against Aris.

The Turkish club had agreed with both Panathinaikos (it will keep a resale rate of 30%) and the player, but they had to wait for a while for the transfers' ban to be lifted permanently, imposed on them last season for breaches of the licensing regulation.

[12] On 23 December 2021, Kolovetsios was extremely unlucky in the match between his club and Yeni Malatyaspor, as a forced change was made due to injury and the examinations he underwent showed that he had a ruptured anterior cruciate ligament in his left knee, that will keep him in the sidelines for at least six months.