Answer
Yes, Marko Pantelić retired from professional football before the age of 40. He retired in 2015 at the age of 38, after a career that spanned 19 years and included spells at Partizan, Olympiacos, Bayern Munich, Milan, Hertha Berlin, and Red Star Belgrade. Pantelić was a versatile player who could play as a winger, striker, or attacking midfielder. He was known for his pace, dribbling, and finishing ability.