From TheChels.info - The Chelsea Football Club Wiki
|Full Name||Thierno Mamadou Ballo|
|Date of Birth||2 January 2002|
|Place of Birth||Abidjan, Ivory Coast|
|Chelsea career||2018 -|
|Other clubs||Viktoria Köln|
Thierno Ballo is a forward currently playing in Chelsea's Academy team.
Thierno agreed to join Chelsea from Viktoria Köln in Germany upon turning 16.
Ballo finished his first season at the club as the Under-18s' top goalscorer, playing both as a central striker and as a wide forward, and finishing the season as a central midfielder. He moved up to the Development Squad more often in 2019-20 and continued to put in mature, competent performances.
Thierno has represented Austria up to Under-19 level. He is also eligible to play for Germany, Guinea, and the Ivory Coast.
Youth and Development Football
Thierno signed a new deal in December 2020 to expire at the end of the 2021-22 season.