Chelsea are still on course to win a quadruple for the first time in the club’s history.
To achieve that feat, they must also do something else they have never done before, which is to get past Barcelona in the Women’s Champions League knockout stage.
Having already won silverware this season in the League Cup, Sonia Bompastor’s side have reached the FA Cup final and sit three points clear at the top of the Women’s Super League with four games to play.
But to win the European trophy that has so far eluded them, their immediate task is to beat three-time winners and current holders Barcelona over two legs in the semi-finals.
Sunday’s first leg takes place in Catalonia at the 6,000-capacity Johan Cruyff Stadium (kick-off 17:00 BST), before the return leg is played at Stamford Bridge on 27 April (14:00 BST).
Chelsea have lost to Barcelona at this stage of the competition in the past two seasons, but what are their chances this time?
Barca enduring ‘weakest’ season
Three defeats in 38 games across all competitions is hardly cause for concern, but for Barcelona it is uncharacteristic.
Pere Romeu’s side are seven points clear at the top of Spain’s Liga F but have been beaten twice in the division this season, losing to strugglers Levante and suffering a first-ever Women’s Clasico defeat by Real Madrid.
They also lost their opening Champions League group game at Manchester City.
Barcelona have lost more games, scored fewer goals and conceded more at this stage of the season than in any of their previous three campaigns.
“It’s ridiculous to say they are not as dominant because they are seven points clear and in the semi-final of the Champions League,” Spanish football journalist Alex Ibaceta told BBC Sport.
“This is probably their weakest season. The style of play has changed, it’s not as fluid as it was in the last few seasons, but they are still dominant and still Barcelona.
“This game is a blank sheet. The highs and the lows of the season, mentally they are very able to erase those moments and just focus on Chelsea.”
Putellas back in full swing and overshadowing Bonmati
The good news for Chelsea is that, statistically, Aitana Bonmati is having her least effective season in recent years.
The bad news? Alexia Putellas is back to her best.
Two-time Ballon d’Or winner Putellas missed 10 months with an anterior cruciate ligament injury sustained in July 2022 but is playing a starring role again this season.
Putellas is Barcelona’s second-highest scorer this season behind Ewa Pajor, with 18 goals in 31 games in all competitions.
Having a recognised number nine in Pajor, who joined Barcelona in the summer from Wolfsburg, has alleviated the attacking pressure on Bonmati.
They are very open to making mistakes
We can expect plenty of action down Barcelona’s left side and Chelsea’s right, which is where both sides create the majority of their chances.
Ibaceta anticipates Chelsea will have plenty of space on that side – setting up the prospect of a fascinating tactical battle as the likes of Lucy Bronze and Johanna Rytting Kaneryd face off with Putellas and Salma Paralluelo.
Barcelona typically press much higher than Chelsea but have shown in their defeats this season that they are vulnerable to conceding on the counter attack, where Chelsea’s forwards, particularly Mayra Ramirez, thrive.
Chelsea will hope that having serial Champions League winner Bompastor on their side can finally help them overcome their nemeses.
The Frenchwoman lifted the trophy as a player and manager with Lyon and is the only coach to have defeated Barcelona over a tie in the competition in the past four years.