Bukayo Saka was instrumental in ensuring Arsenal finished top of Group F, securing a more friendly draw for the Europa League knockout stages.
The 18-year-old started the evening at left wing-back in a surprise switch to a back three from Freddie Ljungberg. In his first three games as interim head coach, the Swede only used a back four.
Saka impressed in the first half, but really shone in the second. When pushed further upfield, he swung in an inch-perfect cross for Alexandre Lacazette to nod home before curling an effort into the bottom corner to equalise.
His contributions meant the Gunners will now go into the Europa League knockout draw as a seeded team.
Despite impressing in both as a wing-back and as a winger later in the game, Saka wasn't totally happy with his initial role at first.
"He (Saka) was amazing. I think he was a bit upset with me that he had to play wing-back and full-back because he doesn't like it so much," Ljungberg said in his post-match press conference.
"But no, he's a tremendous talent. You can see it again, his final ball and the last bit is always effective. There's always an end product to his work.
"Bukayo did tremendous."
The Swede has seen Saka progress through the ranks at Arsenal, nurturing his talent when he first arrived at the club as Under-15s coach. This type of relationship then spread when he became Under-23s manager last season.
He took players including Joe Willock, Emile Smith Rowe, Reiss Nelson and Eddie Nketiah under his wing.
With such a strong connection to the Arsenal academy, it has been suggested that he would try and help bed a few more Arsenal prospects into the first team while in charge.
This seemed to be the case when Tyreece John-Jules, Zech Medley, James Olayinka and Robbie Burton made the trip to Liege. However, due to the nature of the game, none featured.
"I feel sorry for our young players," Ljungberg added.
"A lot of them have not been on loan. They haven't got that exposure to play 90 minutes of men's football for a longer period of time.
"I wanted to get them on the pitch to give them that experience. I know how good they are but they just don't have experience. Some of them made some mistakes today but from those mistakes they won't re-do them.
"That's valuable for them and we won the group. "
Facing Manchester City, Chelsea and Manchester United in the next few weeks, this seemed like the perfect time to blood these players in.
Now that boat has sailed, it may be best for those like John-Jules and Medley to look for loan moves in January as they continue to excel at Under-23 level.
With such a talented crop of youngsters at the club, it'd be a shame to see them fail to reach their potential in Arsenal colours.
