Brazilian defender Marcelo scored the only goal as last season's semi-finalists Lyon grabbed a 1-0 win at CSKA Moscow, as they look to go one better this term with the final at their Groupama Stadium.
Arsenal, though, return home with two away goals, one foot in the last eight and their shattered confidence very much restored. Amid whistles from the 70,000 plus Milan fans inside San Siro, an inspired Arsenal side showed that if they put in disciplined performances with full concentration then Ozil will quite simply do the rest.
Milan will be without centre-back Mateo Musacchio for the clash at the San Siro on Thursday, but Gatusso is likely to be able to name his first-choice line-up.
Admittedly, the reasons for Milan's decline differ from those of Arsenal. He offers the sort of dynamism that no other player in this squad possesses.
Fiorentina player, Milan Badelj, lead the tributes by saying that "you are the brother or the son that everyone would want to have".
They also haven't played in over a week, which isn't great for an Arsenal team that has played three times in just over that same time frame and are missing some key pieces.
Despite the differences, there are still lessons to be learned, especially in what not to do in a bid to arrest decline.
It would've been a homecoming for ex-Milan youth team player Pierre-Emerick Aubameyang, but he is cup-tied following his January transfer from Borussia Dortmund. At the moment, it is certainly hard when you go through a patch like that but I believe as well it is a good opportunity to show you have the quality and the strengths. The club is already down and out of every competition including the Premier League where they find themselves struggling in the sixth position, nine points behind fifth-placed Chelsea.
Listening to him it sounds like Arsenal are going to defend in numbers to try and have a chance when the Milanese come to the Emirates in a couple of week's time. "He had a scan yesterday, which was quite good".
Arsenal chiefs are becoming frustrated with the situation, and could take the decision to replace the Frenchman in the summer, and, according to Chilean newspaper La Cuarta (Via The Metro), Pellegrini is also one of the names being considered.
Fail to do so however and things could get immeasurably worse. Given the spending spree, many expected Milan to be a lot stronger. Fascinating interviews with Gary Lineker, Russell Brand, Lily Allen, Eric Cantona, Alastair Campbell, Jon Ronson, Nick Clegg and more.
Oil: Russia remains outside of the OPEC out of choice
The investment yielded four billion barrels of crude, condensate and NGLs globally - not since the 1930s was so little oil found. We jointly agreed then [on last year's meeting with United States shale producers] that we should continue with this dialogue.