According to "Kicker" news, Werder Bremen midfielder Klasen has submitted an application to leave the team.
According to other media sources, Ajax was negotiating on the transfer of Klasen, and they made an offer of 12 million euros.
The 27-year-old Clarkson came out of the Ajax youth training, he was the team captain.
Clarkson helped Ajax reach the Europa League final. He joined Werder Bremen from Everton in the summer of 2018.
Krassen’s contract with Werder Bremen will expire in the summer of 2022. He has played twice in the Bundesliga this season, and he also played once in the German Cup.