Ole Gunnar Solskjaer has included new signings, Cristiano Ronaldo, Raphael Varane and Jadon Sancho in Manchester United's squad for the 2021/22 UEFA Champions League.
United would be seeking revenge of their Europa League defeat to Villareal in Group F, alongside, Atalanta and Young Boys.
Ronaldo would be eager to impress the Red Devils fans after making his return to the club after 12 years after leaving the club for Real Madrid.
Meanwhile, youngster - Mason Greenwood - would feature in the competition though he was not included on the 25-man list
UEFA rules state that any player under the age of 21 that qualifies as "homegrown" doesn't need to be registered as part of the maximum 25-man squad for the tournament and can instead be included on the B list.
As such, they are still eligible to play in the tournament so long as they are added to the B list which can be amended by the club at any time, according to Manchester Evening.
Manchester United squad:
David de Gea, Tom Heaton, Dean Henderson
Defenders: Victor Lindelöf, Eric Bailly, Harry Maguire, Raphaël Varane, Diogo Dalot, Luke Shaw, Alex Telles, Aaron Wan-Bissaka
Midfielders: Paul Pogba, Juan Mata, Jesse Lingard, Amad Diallo, Fred, Bruno Fernandes, Jadon Sancho, Nemanja Matić, Donny van de Beek, Scott McTominay
Forwards: Cristiano Ronaldo, Anthony Martial, Marcus Rashford, Edinson Cavani
European giants, Chelsea, on the other hand would be facing Juventus, Zenith and Malmo in Group H and boss, Thomas Tuchel wanted no timed by including his new signings in his title-defence squad.
Saul Niguez who is on a season-long loan from Atletico Madrid and Romelu Lukaku who returned to Stamford Bridge after seven years away were included in the squad.
Goalkeepers: Kepa Arrizabalaga, Marcus Bettinelli, Edouard Mendy, Lucas Bergström
Defenders: Marcos Alonso, César Azpilicueta, Trevoh Chalobah, Ben Chilwell, Andreas Christensen, Thiago Silva, Reece James, Antonio Rüdiger, Malang Sarr
Midfielders: Lewis Baker, Ross Barkley, Jorginho, Kai Havertz, N’Golo Kanté, Mateo Kovačić, Mason Mount, Saúl Ñíguez, Christian Pulišić, Hakim Ziyech, Callum Hudson-Odo, Harvey Vale