Borussia DortmundTeam·Borussia Dortmund has reportedly seen a significant €20 million transfer offer for Mainz 05Team·Mainz 05's burgeoning talent, Kacper PotulskiPlayer·Kacper Potulski, rejected. The 18-year-old centre-back, who emerged as one of the BundesligaCompetition·Bundesliga's standout performers last season, remains a key figure for the Rhineland club, despite Dortmund's considerable approach.
According to the Polish sports website Przeglad Sportowy Onet, Dortmund made a direct move for Potulski, but Mainz 05Team·Mainz 05 swiftly declined the bid. This development comes as several top European clubs are understood to be monitoring the young defender's situation.
Potulski's ascent has been rapid. Having progressed through every youth setup at Mainz 05Team·Mainz 05 since 2023, he earned his first-team call-up just before the winter break. His performances in the Conference LeagueCompetition·Conference League quickly garnered attention, leading to his BundesligaCompetition·Bundesliga debut in late November. A pivotal moment arrived in only his second league outing, where he scored against Bayern MunichTeam·Bayern Munich at the Allianz Arena, a goal that immediately placed him on the national radar.
Despite his early impact, Potulski's playing time under head coach Urs Fischer saw a notable reduction from March onwards. He spent five of seven matches on the bench until early May, a period that reportedly caused some discontent within his camp. This fluctuating role has coincided with a change in representation, as Potulski, at his father's urging, has switched to Sports360, a move often indicative of a potential transfer push.
Former BundesligaCompetition·Bundesliga defender Tomasz Hajto, speaking on Polsat Sport in late April, had already highlighted the widespread interest in Potulski. "According to my contacts, several German clubs already have Kacper on their radar—such as Leverkusen and Dortmund. But clubs from England and Italy are also interested in him," Hajto stated, estimating a transfer fee "somewhere around 30 million euros" for the centre-back.
Hajto also voiced concerns regarding Mainz's management of their prized asset. "The lad might soon ask himself why he should stay in Mainz if he plays brilliantly one moment and then not at all the next. That's a danger," he told Bild, adding, "Kacper has always made the most of his chances and put in strong performances. That is why he cannot understand why Potulski was sidelined again at times under Fischer."
However, Mainz 05Team·Mainz 05 remains resolute in its stance. Sporting director Niko BungertCoach·Niko Bungert has publicly affirmed Potulski's importance, emphasizing his contract which runs until 2028. "Kacper is the future. He has incredible quality and will be a regular on our pitch in the future. I'm certain of that," Bungert asserted.
Dortmund's pursuit of Potulski is further complicated by their recent acquisition of Joane GadouPlayer·Joane Gadou from RB Salzburg for €20 million, also a centre-back. This signing raises questions about their continued interest in the Mainz star, especially after their initial offer was rejected.
On the international front, Potulski's burgeoning reputation has been recognized with a call-up to the senior Poland squad for upcoming friendly matches against UkraineTeam·Ukraine and NigeriaTeam·Nigeria, potentially marking his debut after only two U21 appearances.
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