Born in
Athens, Greece, Koronios started playing
club basketball with the
youth clubs of Peristeri Athens, in 1982. He began his
pro career with the senior men's team of
Peristeri, in 1986. In 1998, he moved to the Greek club
AEK Athens, where he played for two seasons. Then, he continued his career with the Greek clubs
PAOK Thessaliniki (2000–01),
Maroussi Athens, for two seasons (2001–03),
Panionios Athens (2003–04), and finally, with
Olympiacos Piraeus (2004–05). At the time of his retirement, Koronios was the unofficial all-time stats leader of the Greek Basket League,
since the 1986–87 season in points scored, with 7,080, in assists, with 1,264, in steals, with 583, in free throws made, with 2,020, and in three pointers made, with 828. In total, Koronios appeared in 448 games in the
top-tier level league of Greek basketball. and
Vassilis Spanoulis. ==National team career==