While being impressed by the speed and precision of the counter-attack that allowed Benjamin Sesko to plunder the winner, the Austrian enjoyed the enthusiasm and passion shown by Matheus Cunha, when performing his defensive duties.
The Brazilian had a tough battle against James Garner throughout, with the former Red performing excellently, but had a key role in the goal and worked hard to help Carrick's men retain the slender lead.
Late on, he displayed his joy at shepherding the ball out for a goal-kick, shortly before being substituted.
"We need confidence at Old Trafford," Glasner said at his press conference to preview Sunday's 14:00 GMT kick-off.