Ada Hegerberg's first-half hat-trick in Budapest ensured Lyon stormed to a fourth straight title and sixth overall against first-time finalists Barcelona.
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Lyon set new records in 2017/18 by winning their fifth UEFA Women's Champions League title and third in a row. They increased those tallies a year later.
The final was separated from the men's UEFA Champions League decider for the first time, with Budapest's Ferencváros Stadion the venue. And Spain had their debut finalist in the shape of Barcelona, though they were taught a harsh lesson as they found themselves 4-0 down just 30 minutes in.
There had been a similar shock for Barcelona in the first leg of the round of 32, when they were 3-0 behind an hour in against Kazakhstan's BIIK-Kazygurt. Toni Duggan got an away goal, Barcelona won the second leg 3-0, and they did not concede again until early in the final.
While Barcelona survived the round of 32, Manchester City did not after a 2-0 home loss to Atlético Madrid ended their hopes of at least a third semi-final in as many entries. Debutants Juventus also fell, narrowly 3-2 on aggregate to Brøndby, whose compatriots Fortuna Hjørring succumbed once again to Fiorentina.
Lyon sailed through against Norway's Avaldsnes, and then knocked out Ajax 13-0 on aggregate. It was 10-0 overall for Wolfsburg against Atlético, but while Barcelona, Chelsea, Paris Saint-Germain and Bayern München also strolled through the round of 16, Sweden's Rosengård lost to Slavia Praha – reaching a second straight quarter-final – and LSK Kvinner ended Norway's nine-year wait for last-eight contenders, seeing off Brøndby.
If anyone expected another Lyon-Wolfsburg final after 2016 and 2018 (not to forget 2013) they were disappointed as the duo were paired in the last eight. Lyon narrowly won the first leg 2-1 in front of a new record crowd for the round, 17,840, before storming to a 4-2 victory at Wolfsburg.
Two other prime contenders, Chelsea and Paris, were also matched. Chelsea won the first leg 2-0 but Paris seemed to have sent the contest to extra time in the return only for Maren Mjelde to clinch it for the London club at the death. In the other ties, Bayern were held 1-1 at Slavia (in front of a Czech record crowd of 6,822) but then triumphed 5-1 at home, and Barcelona beat LSK 3-0 at the Mini Estadi and 1-0 in Norway.
One of Barcelona and Bayern were to get to a first final, and it would be the Blaugrana, prevailing 1-0 both away and home. Meanwhile, Lyon again won their home leg 2-1, beating Chelsea with the crowd of 22,911 the most ever in this competition outside a final. In the return Eugénie Le Sommer struck early but Ji So-Yun's free-kick ensured Lyon had to endure a nervous finish.
Nevertheless, Lyon were booked up for Budapest and led within five minutes through Dzsenifer Marozsán, who was born in the Hungarian capital. Hegerberg then contributed a 17-minute hat-trick to make it 4-0 by the half-hour. There was no way back for Barcelona, though they did not concede again and pulled one back at the end through on-loan Nigerian forward Asisat Oshoala.
Wendie Renard set a record in the final with her 82nd competition appearance, one ahead of Camille Abily. For Renard and Bouhaddi it was an eighth final; they and Le Sommer had now been part of all six of Lyon's triumphs.