Four clubs, four ambitions, one final in Oslo on May 23. Arsenal defend their crown against OL Lyonnes for the second year running. Bayern chase a maiden final against a Barcelona side pursuing an unprecedented sixth in a row. The shape of Europe's women's game gets rewritten this weekend.

The thing about a final four is that it rarely produces one story. It produces four. Each club walks into a semi-final week asking something slightly different of itself, and what the continent looks like on the other side of May 23 depends entirely on who answers first. Two ties, four clubs, four versions of what winning would mean. None of them the same.

Arsenal: defending a title they only just finished winning

A year after Renée Slegers took Arsenal from interim caretaker to Champions League winner, the Gunners arrive at their own front door carrying the weight of a defence. Slegers was made permanent in January 2025 and masterminded a comeback from 2-1 down against OL Lyonnes in last year's semi before beating Barcelona in Lisbon. This time, the tie is home first, away second, and the opponent is the same.

The path back here has been earned. A mid-table league phase finish meant an extra play-off round against OH Leuven before a quarter-final against Chelsea that Arsenal won 3-2 on aggregate, the first all-London two-legged tie in UEFA women's competition history. Alessia Russo sits top of the competition's scoring charts on eight goals. Slegers, speaking to UEFA this week, framed the rematch as a challenge the group is drawn to rather than burdened by.

We've learned a lot from those experiences last year, how much it takes, but it also inspires us to see what we can do and what we're capable of.

Renée Slegers, Arsenal head coach, speaking to UEFA ahead of the Lyon tie

OL Lyonnes: a record fifteenth semi and a new voice in charge

Nobody in this competition has carried this weight for longer. OL Lyonnes arrive at a record fifteenth UEFA Women's Champions League semi-final, six more than any other club. Eight titles, eleven finals, and a head-to-head over Arsenal that reads seven wins to two across all their previous meetings.

What is new is the voice on the touchline. Jonatan Giráldez, first-year head coach after replacing Joe Montemurro last summer, has the squad top of the Première Ligue and still alive in the French Cup. The Wolfsburg quarter-final was the only real scare, Lyon losing the first leg 1-0 before storming back with three extra-time goals in the return, the likes of Marie-Antoinette Katoto, Tabitha Chawinga and Melchie Dumornay introduced from the bench. That is the depth on offer.

Dumornay is the piece Arsenal will be thinking about first. The Haiti international has scored in each of Lyon's last two semi-final first legs and has a habit of finding the net on trips to north London. If Lyon win this, a ninth European crown becomes real. If they do not, the longest institutional memory in the competition goes through another reset.

Bayern München: chasing a first final, pulling a country with them

Bayern have done this twice before and never gone further. Under José Barcala, appointed head coach in May last year after winning a domestic double with Servette, the Bundesliga side have made the Allianz Arena their most persuasive argument. One defeat in their last sixteen UWCL home matches. Four wins from four at home in this season's league phase, including a 3-2 over Arsenal and a 2-1 over Manchester United in the quarter-final second leg. The club sold ten thousand tickets in the first forty-eight hours of sale for Saturday.

The memory they carry into this tie is a difficult one. Bayern opened their league phase with a 1-7 defeat at Barcelona on Matchday 1. What has happened since suggests a team that absorbed the lesson rather than buckled under it. Pernille Harder sits on seven goals in the competition, though Giulia Gwinn is carrying a dislocated shoulder from international duty and Klara Bühl is working back from a calf issue. Bayern do not need to out-pass Barcelona. They need the Allianz to do the work it has done all season.

Barcelona: an eighth straight semi and the Bonmatí question

Barcelona arrive at a record-extending eighth consecutive semi-final, pursuing a sixth consecutive final that would set a new competition benchmark. Pere Romeu's second season has so far delivered the Supercopa, a commanding Liga F lead and a 12-2 aggregate destruction of Real Madrid in the quarter-finals. The attacking core of Ewa Pajor and Alexia Putellas has been decisive in Aitana Bonmatí's absence.

Bonmatí herself is the story within the story. Out since breaking her left fibula on Spain duty at the end of November, the three-time Ballon d'Or winner returned to full team training on Monday. Her own public aim has been the second leg at the Camp Nou, not the first leg at the Allianz. Her availability for Saturday remains unconfirmed.

The question Barcelona are answering is not whether they belong in finals. The question is whether this group, with this squad size and this injury list, can reclaim the trophy they lost to Arsenal in Lisbon.

What four results mean for the continent

Each outcome redraws a different map. Bayern reaching Oslo would be the first German club back in a final since Wolfsburg's 2023 run, a genuine widening of the top table. A ninth Lyon title would extend a record already in a category of its own. A sixth straight Barcelona final would push the Catalans past Lyon's old mark and formalise the era most of us have been living in for five years without always naming.

Four clubs. Four questions. One weekend to start answering them.