[2] Coach Nikolić included him in first 11 24 times in front of his competitors Branislav Danilović, Aleksandar Jovanović and Boris Radunović.
[4] Kljajić returned to Partizan at the beginning of new season,[11] as a competitor of Milan Lukač and Živko Živković, his former Metalac teammate.
[12] Coach Marko Nikolić, who also trained Kljajić in Rad included him in first 11 in Serbian Cup against Sloga Petrovac.
During the season, he was not given a chance beside Milan Lukač and Živko Živković, mainly defended in friendly matches and several times was on the bench.
Four days later, he made his debut for the club in Europa League group stage against Athletic Bilbao at San Mamés.
[18] He also started the next season as a first choice, but after the club signed Vladimir Stojković, Kljajić spent the rest of the same year as a back-up pick.
[21] Kljajić made his international debut for the Serbia national football team in a friendly 3-0 loss to Qatar, played on 29 September 2016, under coach Slavoljub Muslin.