Where was Tuchel-Ball developed?  Thomas Tuchel is a German professional football manager and former player who is the current head coach of Premier League club Chelsea. Born in Krumbach, Tuchel's playing career ended at age 25, as a result of a chronic knee cartilage injury, and in 2000, began his coaching career as a youth coach at VfB Stuttgart. Chelsea Football Club are an English professional football club based in Fulham, West London. Founded in 1905, the club competes in the Premier League, the top division of English football. 1. Fußball- und Sportverein Mainz 05 e. V., usually shortened to 1. FSV Mainz 05, Mainz 05 or simply Mainz, is a German sports club, founded in 1905 and based in Mainz, Rhineland-Palatinate.