Europa League play off first round trip to Parkhead on Wednesday. Skipper Koopmeiners was dumped to the bench for the shock 1-0 defeat to newly-promoted Eredivisie side RKC Waalwijk on Saturday.
And with Serie A giants Atalanta poised to make an offer for the Dutch international AZ could be significantly weakened when playing the Hoops.
AZ have already sold Calvin Stengs to Nice, Myron Boadu to Monaco and Marco Bizot to Brest this summer, which has brought in £35 million to the Dutch club.But manager Pascal Jansens revealed he's drummed into his players just what the European tie means to the club.He said: "At the moment, Teun is an AZ player and I have to assume he will be with us in Glasgow."I don't regret not picking him in the starting.
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