Arsenal welcomed acclaimed teenager Gedion Zelalem back to action in Dortmund for a UEFA Youth League match, but there was a return from injury equally as significant.
Arsenal's under-19 team welcomed Jon Toral back into the fold, the former Barcelona trainee who signed in summer 2011.
Toral had not played a game for any Arsenal youth side in 2013, after picking up injury which required an operation which meant a long spell on the sidelines.
He had played five games at the start of last season for the under-21s, but the last of these came 11 months ago in a December 12, draw at Reading in which he provided an assist.
Against Dortmund last week he made his comeback from the start in a really tricky fixture to do so in, and looked better than ever.
He crossed the ball for Austin Lipman's opener, and scored himself from the edge of the box, making a big impact in his comeback match.
Toral was back in action against Aston Villa in midweek, and scored two goals in the 4-2 win, with Serge Gnabry and Emmanuel Frimpong also netting.
He continued where he left off in his comeback match, scoring twice from close range and setting up another in the comprehensive victory.
It means in his first two matches this calendar year, in which he may have allowed himself a slow start, he has had the opposite - three goals and two assists from central midfield.
Arsenal's signing of Toral as a 16-year-old sparked a bitter war of words with Barcelona, with the Spanish club branding the deal 'immoral', before Arsene Wenger staunchly defended the move.
So far fans had been yet to really see the best of him, with two injury-interrupted seasons blighting his progress.
Now 18, Toral's instant impact illustrates his clear potential if he can just stay healthy, and it's fair to say he deserves a bit of luck on that front.
His comeback, along with striker Benik Afobe's in midweek from an eight-month lay-off is further illustration of the strength in depth Arsenal have in their youth set up.
Toral is definitely a player to keep an eye on over the course of the season, because if he can continue this type of form - this time next year talk of the first team may not even be out of bounds. He is back relevant again, and for Arsenal - that is excellent news.
Here's Toral in his Barcelona days..