Klaassen left Everton in the summer after failing to make an impact.
Everton earned a 2-0 win over Crystal Palace on Sunday afternoon.
Davy Klaassen made just seven Premier League appearances for Everton and is now in the Bundesliga with Werder Bremen.
Davy Klaassen made just seven Premier League appearances before he was sold by Everton, joining Bundesliga outfit Werder Bremen this summer
Davy Klaassen started just three Premier League games in a forgettable spell at Everton before joining Bundesliga outfit Werder Bremen
Everton have sold Davy Klaassen and loaned out Sandro Ramirez.
Klaassen left Everton to become Werder's club-record signing.
Everton midfielder Davy Klaassen is reportedly set to miss a pre-season game with his exit close.
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Klaassen is reportedly nearing a move from Everton to Werder Bremen.