The past meets the present on Wednesday, as Pep heads back to the Nou Camp - this time in charge of Manchester City.
McCourt completed the estimated €45m purchase of a controlling stake in the French club on Monday.
Monaco boss Leonardo Jardim has insisted that his side will not change styles, ahead of their clash with CSKA Moscow.
Tottenham's Son Heung-min feels anything less than three points against former club Bayer Leverkusen would be a failure.
Dortmund will be without Marcel Schmelzer, Raphael Guerreiro, Gonzalo Castro, Andre Schurrle, Sven Bender, Erik Durm, Marco Reus and Neven Subotic.
Buffon will captain the Bianconeri at the Parc Olympique Lyonnais as the Italian champions seek to add a second win in three games in the competition.