Ajax's players greet the fans after the first leg of third qualifying round match of UEFA Champions League between PAOK Thessaloniki and Ajax at Toumpa Stadium in Thessaloniki, Greece, on Aug. 6, 2019. (Xinhua/Dimitris Tosidis)

Ajax's Dusan Tadic (2nd R) vies with PAOK's Leo Matos (1st R) during the first leg of third qualifying round match of UEFA Champions League between PAOK Thessaloniki and Ajax at Toumpa Stadium in Thessaloniki, Greece, on Aug. 6, 2019. (Xinhua/Dimitris Tosidis)

PAOK's players celebrate during the first leg of third qualifying round match of UEFA Champions League between PAOK Thessaloniki and Ajax at Toumpa Stadium in Thessaloniki, Greece, on Aug. 6, 2019. (Xinhua/Dimitris Tosidis)

PAOK's Dimitris Pelkas (R) vies with Ajax's Daley Blind(C) during the first leg of third qualifying round match of UEFA Champions League between PAOK Thessaloniki and Ajax at Toumpa Stadium in Thessaloniki, Greece, on Aug. 6, 2019. (Xinhua/Dimitris Tosidis)

PAOK's Chuba Akpom (L) celebrates during the first leg of third qualifying round match of UEFA Champions League between PAOK Thessaloniki and Ajax at Toumpa Stadium in Thessaloniki, Greece, on Aug. 6, 2019. (Xinhua/Dimitris Tosidis)

PAOK's Chuba Akpom celebrates during the first leg of third qualifying round match of UEFA Champions League between PAOK Thessaloniki and Ajax at Toumpa Stadium in Thessaloniki, Greece, on Aug. 6, 2019. (Xinhua/Dimitris Tosidis)

Ajax's players celebrate during the first leg of third qualifying round match of UEFA Champions League between PAOK Thessaloniki and Ajax at Toumpa Stadium in Thessaloniki, Greece, on Aug. 6, 2019. (Xinhua/Dimitris Tosidis)

PAOK's Leo Jaba (R) vies with Ajax's Daley Blind during the first leg of third qualifying round match of UEFA Champions League between PAOK Thessaloniki and Ajax at Toumpa Stadium in Thessaloniki, Greece, on Aug. 6, 2019. (Xinhua/Dimitris Tosidis)