Boycott will begin when the Bundesliga side take on Atletico Madrid in the Champions League on Tuesday.
Tuchel, who has been touted as a potential successor to Arsene Wenger at Arsenal, is under contract at Dortmund until 2018.
Herculez Gomez joins Mark Donaldson to break down the latest from around the world for Yanks Abroad.
Bayer Leverkusen manager Roger Schmidt has hailed Chicharito Hernandez's "sensational form" since the winter break.
Bundesliga leaders Bayern slipped up at Hertha Berlin to give a glimmer of hope to the teams chasing them.
Bayern Munich coach Carlo Ancelotti has been asked to explain why he made an offensive gesture following his side's 1-1 draw at Hertha Berlin.