Manchester United will assess their latest casualties ahead of the resumption of their season away to Brentford on Saturday night.
Casemiro sustained a recurrence of a hamstring problem on the eve of the FA Cup quarter-final victory over Liverpool 12 days ago and Jonny Evans withdrew from the starting XI with a knock he has been managing in recent weeks.
Harry Maguire withdrew from the England squad early after coming off injured in the 1-0 defeat to Brazil last Saturday.
None of the trio appeared in imagery or footage from training released by United on Thursday. Marcus Rashford, Victor Lindelof, Diogo Dalot, Bruno Fernandes, Scott McTominay, Christian Eriksen, Rasmus Hojlund and Alejandro Garnacho were all visible after returning from international duty.
Garnacho had started in Argentina's 3-1 friendly defeat of Costa Rica in Los Angeles just over 24 hours earlier.
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Lisandro Martinez, who has been absent for eight weeks with a medial collateral ligament injury, did not appear in either of Argentina's friendlies but did ball-work during their training sessions.
United manager Erik ten Hag eased Martinez back into the side when he returned from a four-month lay-off following corrective surgery on a metatarsal fracture in January. Martinez emerged off the bench in the 2-2 draw with Tottenham in January and started in the FA Cup fourth round win at Newport County in United's next fixture two weeks later.
Academy members Finley McAllister, Zach Baumann, Louis Jackson and Harry Amass were among the youngsters drafted into first team training on Thursday to make up the numbers in the absence of unavailable senior players.
United will be without long-term absentees Tyrell Malacia (knee) and Luke Shaw (muscular).
