 Ilhan made his first professional start in a league game at the age of 16 years and 331 days, where he scored his first goal in a 1-4 loss against Albirex Niigata Singapore on August 15, 2019.Ilhan scored his third goal for the club in a heavy 4-1 defeat at the hands of Hougang United in the Young Lions' opening match of the 2020 Singapore Premier League season.As of April 2020, Ilhan has scored 3 goals in just 5 matches for the Young Lions.