
For Rudi Völler, managing director sport, the 1.89 metre central striker is a good addition to the current strike force. "After the serious injury to Joel Pohjanpalo, we intensified our search for a classic centre forward. With Isaac Kiese Thelin, we've brought in a striker who's good in the air."
"He's done brilliantly in the Belgian league," said head coach Heiko Herrlich. "Isaac represents an additional option for us up front. He will make our attacking game even more flexible."
Kiese Thelin is looking forward to the new challenge. "Bayer 04 are a big club with an exciting past. Leverkusen are consistently in Europe and they have ambitious targets for the coming season. I want to contribute to achieving those targets."
Thelin will wear the number 11 shirt for the Werkself. "Of course, I know Stefan Kießling. He's a legendary striker," declared Kiese Thelin. "Being the number 11 makes me feel proud. I hope I can produce good performances in the shirt."
The striker, born in Örebro, has won 24 caps and scored two goals for Sweden and he made four brief appearances at this summer's World Cup in Russia in three group matches and the Round of 16 game against Switzerland. In Sweden, Kiese Thelin played for Karslunds, IFK Norrköping and Malmö FF at club level, before moving on to French club Bordeaux in 2015. Then he joined RSC Anderlecht; there he went out on loan to Waasland-Beveren last term where he scored 16 goals in 25 games – the best return in the Belgian Jupiler Pro League. He also found the back of the net three times in the play-offs.

The situation ahead of the showdown is clear - and promising. The Bayer 04 U19s host Newcastle United on the sixth and final matchday of the 2025/26 UEFA Youth League phase. A win at the Ulrich Haberland Stadium would see the Werkself go through to the knockout stages of the competition for the first time. Ahead of the clash on Wednesday, 10 December (kick-off: 14:00 CET/livestream on bayer04.de and in the Bayer 04 app), coach Kevin Brok spoke about the successful build-up, his assessment of the match and the danger of underestimating the already eliminated English side.
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The Werkself will host VfB Stuttgart at the BayArena on matchday 16 of the 2025/26 Bundesliga season. The game is on Saturday, 10 January, at 18:30 CET. Information on ticket sales.
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The Werkself will host Werder Bremen at the BayArena on matchday 19 of the 2025/26 Bundesliga season. The game is on Saturday, 24 January, at 15:30 CET. Information on ticket sales.
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In the sixth and final match of the league phase of the UEFA Youth League 2025/26, the Bayer 04 U19s have a great opportunity to advance to the knockout phase of Europe’s most prestigious youth competition for the first time. To achieve that under their own steam, they will need a win against Newcastle United at the Ulrich Haberland Stadium on Wednesday, 10 December (kick-off: 14:00 CET/ free admission). In an interview with bayer04.de, managing director sport Simon Rolfes analyses the team's performances so far and their special situation. And the 43-year-old reveals what he would be happy to do without on the day of the match.
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The next opponents in the 2025/26 DFB Pokal have been announced: Bayer 04 will host Bundesliga rivals FC St. Pauli in the quarter-finals. That was the outcome of the draw held this Sunday evening, 7 December, at the German Football Museum in Dortmund, where long-time Bundesliga player and coach Friedhelm Funkel made the draw. The Werkself will play their quarter-final tie on 3-4 or 10-11 February 2026. The exact dates have yet to be finalised.
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