Karim Coulibaly to Strasbourg
Werder Bremen sell teen CB for €20m

1. 21 Aug
   Move confirmed

   Werder Bremen and Strasbourg officially announced Karim Coulibaly's transfer, with Bremen managing director Clemens Fritz confirming the deal on the club's own site.
2. 19 Aug
   Move reported imminent

   Reports said Coulibaly had been given the green light to complete his move to Strasbourg, with Newcastle United understood to have missed out in the race for him.

Werder Bremen have sold rising centre-back Karim Coulibaly to Strasbourg in a reported €20 million deal, making the 19-year-old the Ligue 1 club's most expensive signing of the summer.

Strasbourg have completed the signing of centre-back Karim Coulibaly from Werder Bremen, with both clubs confirming the move on 21 August 2026. The Ligue 1 club have paid a fixed fee of around €20 million, with Bremen retaining a 10 percent sell-on clause on any future sale. Coulibaly, who turned 19 in May, has signed a five-year contract that runs until 2031 and is Strasbourg's most expensive signing of the transfer window.

The move fits a pattern set by Strasbourg's ownership. The club is part of the BlueCo group, which also owns Chelsea, and players have moved between the two clubs regularly since the takeover. Coulibaly had interest from elsewhere too — reports linked Chelsea, Paris Saint-Germain, Manchester United and Newcastle United with the defender over the past year — but it was Strasbourg who moved fastest and got the deal done, with Werder said to have turned down earlier offers before the fee was agreed.

It's easy to see the appeal. A scouting analysis of his 2025/26 season rated Coulibaly among the most sought-after young defenders in Germany, pointing to his line-breaking passing out from the back, his willingness to carry the ball into midfield when passing lanes are shut off, and his reading of the game playing in a high defensive line. At 6ft 3in and left-footed, he also wins the physical battles you'd expect from a centre-back his size, adding aerial strength and presence in his own box to his passing range.

For Werder Bremen, it's a straightforward trade-off between the pitch and the balance sheet. Managing director Clemens Fritz said: 'Karim is a prime example of the path we have chosen: signing young players with development potential and creating value with them.' Coulibaly is the third significant departure of Bremen's summer, following Mio Backhaus and Romano Schmid out of the club, and the fee helps fund a rebuild that has already brought in 11 new faces, including the return of striker Niclas Füllkrug. Bremen are understood to have wanted a bigger fee earlier in the process, reflecting how highly they rated the player, before settling on the deal now agreed.

Coulibaly joined Werder from Hamburger SV's academy in 2024 and made his senior breakthrough last season, playing 27 times and scoring his first goal for the club with a stoppage-time equaliser away at Bayer Leverkusen in August 2025 — a game that finished 3-3 and came in his first Bundesliga start. He was also called into Germany's under-21 squad during the campaign, though a hamstring injury interrupted his form in the second half of the season. 'When I moved to Werder two years ago, those responsible showed me a clear path that was fulfilled 100 percent,' Coulibaly said of his time at the club.

At Strasbourg, he arrives as a long-term piece rather than a short-term fix, given the length of his contract. He should compete for a first-team centre-back spot from the outset, bringing passing quality that suits a possession-based approach along with the physical profile to hold his own defensively in Ligue 1. Given the shared ownership with Chelsea, there will also be attention on whether Strasbourg proves a stepping stone to west London further down the line, though for now the focus will be on how quickly he settles into a new league and country.

• Announced by the clubs100

A sourcing score, not a chance of completion: it grades how solid the reporting behind the move is. The stage and the evidence come from the sources listed below; the arithmetic is fixed in code, the same for every deal.

• Karim Coulibaly joins RC Strasbourg | SV Werder Bremen
• Karim Coulibaly leaves Werder Bremen for Strasbourg transfer | Bundesliga
• Official | Werder Bremen complete lucrative Karim Coulibaly sale
• Official: Coulibaly departs Bremen for Racing Strasbourg
• Karim Coulibaly joins Strasbourg from Werder Bremen for reported €20M
• Karim Coulibaly Scout Report At Werder Bremen 2025/2026