Following Manchester United's 2-0 win over West Brom on Saturday, Louis van Gaal hailed his side's all-round performance and also James Cameron-Borthwick - who got his debut on the day, replacing Marcos Rojo in the 77th minute.
Jesse Lingard broke the deadlock in the 52nd minute with a sublime finish and Juan Mata sealed the win from the penalty spot, after Gareth McAuley brought Anthony Martial down in the box.
However, after the tie the Dutchman heaped praise on Cameron-Borthwick, who came off the bench to help the Reds secure a clean sheet on Saturday.
"I have seen him once or twice and I have been impressed by him," van Gaal told MUTV.
"Yesterday, I knew that Marouane Fellaini was injured, so I talked with [Under-21s coach] Warren Joyce and asked what he had for me.
"I’m always taking with him or [Under-18s coach] Paul McGuinness, and he [Joyce] said at the moment the left full-back is in good shape. I needed a left full-back because Marcos Rojo had played a few games in a row, so I have to take into account that it might be too much.
"I put Cameron in the line-up without any fear, and I have to say he did very well."
Borthwick-Jackson joins the likes of Lingard, Tyler Blackett, Reece James, Saidy Janko, Andreas Pereira, Paddy McNair and Tom Thorpe to have risen through the United ranks under the current management at Old Trafford.
Regarding Man United's match against the Baggies, Van Gaal said: "I expected this line up [from West Brom] with the holding midfielder. They played with 10 men behind the ball and sometimes the striker was also defending, so I think we’ve done very well. I said at half-time that we had to continue and be patient, because the goal was coming.
"Every manager has the right to choose his strategy and we have to organise ourselves against that. We could have played the ball more quickly in the first half; in the second half I believe we did better, until the first goal, after which we forgot to continue to play football, Nevertheless, that changed the game.
"Goals are always the most important thing in a game but we're still not giving many chances away, only Berahino's header. We have won a difficult game that we lost last year. Because of that, [West Brom manager] Tony Pulis chose this strategy but now we have won and improved again."