United have announced their 25-man squad heading for International Champions Cup fixtures with Dortmund and Manchester City in China
Mourinho has announced a 25-man squad ahead of the club's flight to China on Tuesday afternoon for two games in the International Champions Cup.
England's Chris Smalling and Marcus Rashford, Argentina's Sergio Romero and Marcos Rojo, and Northern Ireland star Paddy McNair will all be available following international duty at the European Championship and Copa America Centenario this summer.
They are added to 18 of the 22 players who appeared against Wigan Athletic in the 2-0 win at the DW Stadium on Saturday, with James Wilson, Joel Pereira, Tyler Blackett and Guillermo Varela the quartet left at home.
Marcus Rashford told ManUtd.com he is looking forward to his first senior tour, having only broken into the United side for the first time in February before becoming a club regular and England international.
"It means a lot to be going," he said. "It’s an opportunity to show the manager what you've got and you have to take the opportunity when it comes.
"It would be a massive experience especially with the players that could be going as well. I’ve got a lot I can learn from them."
Borussia Dortmund are United’s first tour opponents in Shanghai on Friday, with the club then travelling to Beijing to play City on Monday.
Zlatan Ibrahimovic, Morgan Schneiderlin and Anthony Martial are among those given extra recovery time following their exertions at the European Championship this summer.
MANCHESTER UNITED SQUAD IN FULL...
GOALKEEPERS: De Gea, Romero, Johnstone
DEFENDERS: Bailly, Blind, Fosu-Mensah, Jones, McNair, Rojo, Shaw, Smalling, Tuanzebe, Valencia
MIDFIELDERS: Carrick, Herrera, Januzaj, Lingard, Mata, Memphis, Mkhitaryan, A.Pereira, Young
STRIKERS: Keane, Rashford, Rooney