Calvin Stengs has become a free agent after agreeing to a mutual termination of his contract at Feyenoord.
The midfielder had been linked with a move to Celtic last summer, but instead joined Pisa on loan.
Calvin Stengs has become a free agent after agreeing to a mutual termination of his contract at Feyenoord.
The midfielder had been linked with a move to Celtic last summer, but instead joined Pisa on loan.