Hertha Berlin has put the name Nikolas Polster on its transfer radar. The 24‑year‑old goalkeeper from Wolfsberger AC is set to replace Tjark Ernst, who is moving to Feyenoord Rotterdam for roughly €5 million. The deal could be sealed before the summer transfer window closes.

Polster, contracted with the Austrian top‑flight club until 2027, is expected to join Hertha for about €2 million. Transfermarkt lists his current market value at exactly €2 million, meaning Berlin would only pay a modest premium. The club plans to install him immediately as first‑choice keeper, pushing Marius Gersbeck to the bench.

Ernst's departure left a gap in goal that Hertha has felt for months. Polster brings international experience from the Austrian Bundesliga and has already served as Austria’s U21 goalkeeper. His presence could shore up the defence and aid the team’s promotion push in the 2. Bundesliga.

Negotiations are already underway, according to a "Sky" report. Hertha has contacted Polster’s agency and is reviewing the release clause. If the transfer goes through, Polster will likely travel to the pre‑season camp in Cologne in July to meet the coaching staff and defenders.

Beyond the goalkeeper target, Berlin is also scouting a centre‑forward and a left‑back. The squad will continue to be reinforced until the transfer deadline to ensure depth for the second half of the season. Officials hope the new signings will raise the tempo and broaden attacking options.

The official announcement could come before the August 31 deadline. Until then, Polster remains active in Austria, training with Wolfsberger AC and awaiting a medical exam. Hertha Berlin will use its media channels to keep fans updated and build excitement.