Goal takes a look at the rundown of the Group A fixtures ahead of the group phase start, as well as what to expect from each team and more.
Champions League 2018-19 - Group A Fixtures
Atletico Madrid won the Europa League against Marseille last season after crashing out of the Champions League group stage and Diego Simeone's side will be eager to emerge as a strong force in the competition.
The Liga side have typically done well in past years to go far in the competition, but they've fallen to city rivals Real Madrid at the final stage twice.
Borussia Dortmund have been handed a particularly unfavourable draw once again, as they too were eliminated in the group phase last year – unable to overcome the likes of eventual winners Real as well as Tottenham, who ended up as table-toppers.
Club Brugge and Monaco are underdogs in this year's Group A though they are two sides not to be underestimated. The French side finished second in their domestic league last season, only one spot behind the force that is Paris Saint-Germain.
Champions League 2018-19 - Group A Table Standings
Champions League 2018-19 - Group A Squads
Atletico Madrid: Adan, Jan Oblak; Diego Godin, Filipe Luis, Santiago Arias, Stefan Savic, Juanfran, Lucas Hernandez, Jose Maria Gimenez; Thomas Partey, Jorge Koke, Saul Niguez, Thomas Lemar, Rodrigo Rodri, Gelson Martins, Vitolo, Cristian Rodriguez; Antoine Griezmann, Nikola Kalinic, Angel Correa, Diego Costa, Dario Poveda, Borja Garces, Victor Mollejo
Borussia Dortmund: Roman Burki, Marin Hitz; Dan-Axel Zagadou, Abdou Diallo, Achraf Hakimi, Raphael Guerreiro, Jeremy Toljan, Manuel Akanji, Lukasz Piszczek, Marcel Schmelzer, Julian Weigl, Omer Toprak; Thomas Delaney, Mario Gotze, Marco Reus, Sergio Gomez, Mahmoud Dahoud, Christian Pulisic, Shinji Kagawa, Axel Witsel, Jacob Bruun Larsen; Jadon Sancho, Francisco Paco Alcacer, Maximilian Philipp, Marius Wolf
Monaco: Daniel Subasic, Diego Benaglio, Loic Badiashile; Antonio Barreca, Jemersen, Djibril Sidibe, Julien Serrano, Andrea Raggi, Kamil Glik, Benoit Badiashile Mukinayi, Amamy Toure, Benjamin Henrichs, Yannis N'Gakoutou-Yapende, Jean Eudes Aholou, Kevin N'Doram, Marcos Paul Rony Lopes, Youri Telemans, Adama Traore, Youssef Ait Bennasser, Aleksandr Golovin, Nacer Chadli, Samuel Grandsir, Han-Noah Massengo, Tristan Muyumba; Radamel Falcao, Stevan Jovetic, Jordi Mboula, Pietro Pellegri, Moussa Sylla, Sofiane Diop, Gobe Gouano
Club Brugge: Karlo Letica, Ethan Horvath; Luan Peres, Benoit Poulain, Matej Mitrovic, Dion Cools, Stefano Denswil, Saulo DeCarli, Brandon Mechele, Clinton Mata, Sofyan Amrabat, Krepin Diatta, Siebe Schrijvers, Marvelous Nakamba, Thibault Vlietinck, Hans Vanaken, Ruud Vormer, Mats Rits, Arnaut Groeneveld; Wesley, Jelle Vossen, Rezaei Kaveh, Emmanuel Bonaventure
TV Channel, Live Stream & How To Watch
In the United States (US), Champions League games will be shown on Univision Deportes and streamed online through B/R Live .
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|Univision Deportes||B/R Live|
In the United Kingdom (UK), the game can be watched live on BT Sport and streamed through the BT Sport app .
|UK TV channel||Online stream|
|BT Sport||BT Sport app|