Sardelis is a former Greece youth international who has passed through the academy of AEK Athens and the reserve team of Panathinaikos (scoring 12 goals in 70 appearances in Super League 2) before joining AKFC in July 2024.
After suffering an ACL injury in 2024/25 preseason, Sardelis returned to make his AKFC debut against Panserraikos in May 2025.