Atlético levelled late against Manchester City to end the first legs, with holders Lyon among the victors.
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The UEFA Women's Champions League round of 32 first legs have kicked off the knockout phase.
Lyon began their bid for an unprecedented fourth straight title with a 2-0 win at Avaldsnes while Juventus played their first ever European match, taking the lead and then coming from behind to draw 2-2 with Brøndby thanks to two Barbara Bonansea goals.
Among other winners were 2018 runners-up Wolfsburg and semi-finalists Chelsea. Paris Saint-Germain and Bayern München also hold advantages, but Barcelona lost 3-1 at BIIK-Kazygurt in Kazakhstan, but might yet be grateful for Toni Duggan's away goal, while a late deflected strike gave Atlético a draw with Manchester City.
Honka 0-1 FC Zürich*
Fiorentina 2-0 Fortuna Hjørring
Ajax 2-0 Sparta Praha
Avaldsnes 0-2 Lyon*
Ryazan-VDV 0-1 FC Rosengård
Juventus 2-2 Brøndby
SFK 2000 Sarajevo 0-5 Chelsea
Thór/KA 0-1 Wolfsburg
BIIK-Kazygurt 3-1 Barcelona
Somatio Barcelona FA 0-2 Glasgow City*
ŽFK Spartak 0-7 Bayern München
St. Pölten 1-4 Paris Saint-Germain*
WFC Kharkiv 1-6 Linköping
Atlético Madrid 1-1 Manchester City
Gintra Universitetas 0-3 Slavia Praha*
LSK Kvinner 3-0 Zvezda-2005*
- Second legs 26 September except *27 September
- Lyon, who won a record fifth title and third in a row last season, beat Avaldsnes in the round of 32 on their way to victory in 2016/17.
- Wolfsburg are the only other former winners involved, while Paris, Fortuna and Zvezda have all previously reached the final.
- Fiorentina, on debut, beat Fortuna 2-1 on aggregate in this round last season and again won at home this time around.
- Juventus, making their debut, are facing Brøndby, the first team to compete in the knockout phase 15 times.
- Cyprus's Somatio Barcelona are the only other debutants involved, one of ten teams that came through the qualifying round, including Glasgow, who won 2-0 at the newcomers in their first leg.
- BIIK of Kazakhstan faced Barcelona in this round in 2015/16, drawing 1-1 at home but losing 4-1 in Spain: this time they beat their visitors 3-1 in the opening led.
- LSK Kvinner have retained the Norwegian title to already book their 2019/20 berth: after Thursday they have won all 21 competitive fixtures they have played in 2018.
Road to Budapest
Round of 16 draw: 1 October
Round of 16: 17/18 October & 31 October/1 November
Quarter-final & semi-final draw: 9 November
Quarter-finals: 20/21 & 27/28 March
Semi-finals: 20/21 & 27/28 April
Final: 18 May 2019, Ferencváros Stadium, Budapest