In Dutch media too: https://www.vi.nl/nieuws/fc-twente-laat-overbodige-huurling-na-half-jaar-gaan
They also mention that Tzolis asked to cut this loan.
According to reports from both English and Greek media, it seems Norwich are trying to cut his loan short and get him back to England. Norwich's new manager David Wagner has apparently asked for Tzolis to return to the club as he wants to use him for the 2nd half of the season.
Hopefully his return means he gets some consistent minutes under his belt and he is able to develop into the player we all want him to be.
https://www.pinkun.com/news/23284574.norwich-city-transfer-news-christos-tzolis-set-return/
https://www.sport24.gr/football/diapragmateyseis-tis-norits-me-tin-tvente-gia-tin-epistrofi-toy-tzoli.9921921.html
Konstantelias should definitely get a call up and a cap. Has been killing it in the league and is getting a lot of publicity from teams in England, Spain and France. He has what a lot of Greek players lack, the balls to take on defenders one on one