Arsenal thrash holders Lyon as Champions League gets underway, and a big win for Barca
The English side beat their hosts 5-1 at the Groupama Stadium, with Caitlin Foord and Frida Maanum handing Arsenal a 2-0 lead before Melvine Malard halved the deficit.
Foord scored again in between two goals from Ballon d'Or runner-up Beth Mead to give Jonas Eidevall's side an impressive opening victory in Group C.
Barca romped to a 9-0 success against Benfica in Group D thanks to seven different goalscorers.
Asisat Oshoala and Geyse scored two each, while goals also arrived from Patri Guijarro, Aitana Bonmati, Mariona Caldentey, Ana-Maria Crnogorcevic and Claudia Pina as last season's runners-up strolled to victory.
The other game in Group D saw Bayern Munich earn a tougher three points at home to Rosengard after Loreta Kullashi's opener for the visitors was cancelled out by Carolin Simon, before Linda Dallmann struck a second-half winner for the Germans.
Group C's other contest ended with Juventus claiming a 2-0 win at FC Zurich, with late goals from Valentina Cernoia and Barbara Bonansea earning Joe Montemurro's side three points.