Career
Glavčić started training football at the age of 5. He played for youth categories of Sloga Kraljevo until 2011, when he joined Partizan. He was loaned to Teleoptik for a season 2014-2015 season.
Glavčić signed his first professional five-year contract with Partizan on 18 June 2015.
He made his Serbian SuperLiga debut in 3rd fixture of 2015-2016 Serbian SuperLiga, against Novi Pazar.
