 On 27 November 2015, in the UEFA Europa League match against Gabala FK, Tziolis reached 400 appearances with all his clubs for all competitions.Tziolis' contract with PAOK was scheduled to expire at the end of 2015–16 season, but would have been automatically renewed if he had played at least 70% of team's matches.In December 2015 the club stated it wanted to keep the international midfielder for many years and that Tziolis had had a first meeting with technical director Frank Arnesen, to speak about the terms of a contract extension.