GKS Katowice are set to lose another key player — Estonian defender Marten Kuusk, who made 59 appearances for the Górnicy, is joining Polonia Warsaw. The move comes as GKS Katowice, currently 5th in the Ekstraklasa with 50 points from 34 games, prepare to compete on three fronts: league, cup, and European competition. The capital club awaits the defender, who featured in GKS’s last match, a 1-1 draw with Pogon Szczecin on 23 May 2026, as his side remain unbeaten in their last five outings (form: DDDWD).

What happened to Kuusk at GKS Katowice?

Marten Kuusk, the 27-year-old centre-back who scored once and provided two assists in his GKS spell, is officially leaving for Polonia Warsaw. The Estonian leaves Śląsk after two years where he became a key part of the defensive line. According to Szymon Janczyk of Weszło, Kuusk will head to the capital to bolster Rafał Górak’s side, which is targeting promotion back to the Ekstraklasa this season. Kuusk made 59 appearances for GKS Katowice, and his departure is part of a wider squad overhaul as the team enters the new campaign with 51 goals scored and 45 conceded (+6 goal difference).

Why is Kuusk leaving GKS Katowice?

The Estonian’s decision isn’t random. GKS Katowice, despite strong league form (5th, 10 points behind Lech Poznań), must now focus on squad-building for the challenges ahead. Kuusk, who saw his role diminish under Górak in recent weeks, found an offer in Polonia Warsaw — a side returning to the 1. Liga with ambitions of an immediate return to the top flight. The defender, with 27 caps for Estonia, is seeking regular football, and the capital club may provide just that.

Who is joining GKS Katowice?

Rafał Górak isn’t sitting idle. The manager has already added Bartosz Wolski, Szymon Bartlewicz, and Pau Resta to the roster, and GKS Katowice’s transfer list remains open. Kuusk’s exit is a loss, but the club has a plan — both in the league and cup competitions. The team, which has gone five matches without a win (DDDDD), must now focus on stability and attacking output to stay in the top half. Meanwhile, Polonia Warsaw gain an experienced defender who could prove pivotal in their promotion push.

What’s next for GKS Katowice and Kuusk?

For GKS Katowice, it’s time for more moves. Górak must decide whether to trust youth or bring in more veterans. Kuusk, meanwhile, starts a new chapter in Warsaw, where his defensive experience could be invaluable. Both sides have clear goals: the Górnicy aim to stay in the Ekstraklasa, while Polonia Warsaw chase an immediate return to the top flight. Kuusk’s transfer is just the start of changes that could shape both clubs’ 2026/27 seasons.