PEC Zwolle fans have started issuing warnings to visiting teams about the talents of their Kiwi midfield maestro.

Ryan Thomas has had a sublime season in the Dutch Eredivisie, leading his side to seventh place in the league table.

The team is in a rotten run of form, losing five of their past six matches, but that isn't stopping their fans from backing their boys and Thomas in particular.

GETTY IMAGES All Whites star Ryan Thomas in action for Dutch club PEC Zwolle.

In their latest home fixture, a 4-3 loss to fourth-place Feyenoord, fans raised a banner which resembled those you'd find on a great South Island road trip, warning of Kiwis for the next 90 minutes.

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While the team may be having a poor run, Thomas' form this year is not in question.

He is one of the leading central midfielders in the division and looks set for a big move at the end of the season, with clubs in Germany said to be circling.

It's his defensive contribution which has been so impressive, playing as the holding man in front of the Zwolle back four, far from the left wing role he was once expected to thrive in.

Thomas is part of the All Whites squad to play Canada in Spain this Sunday (NZT).