Arsenal Women won their UWCL Knockout Round Play-off first leg match 4-0 at OH Leuven.
Caitlin Foord crossed for Frida Maanum to give the Gunners the lead with a glancing header.
They doubled the advantage before half-time, as Chloe Kelly picked out Olivia Smith to sweep the ball home.
Seven minutes into the second half, Foord repeated her delivery for Maanum to tuck away and make it 3-0.
Daphne van Domselaar was forced into a tip-over by a strike from Alixe Bosteels, before Alessia Russo came off the bench to score from close range, following a cross from fellow substitute Smilla Holmberg.
Kim Little later took to the field to reach a landmark 400th appearance for Arsenal.
The second leg is on Wednesday 18 February, with Chelsea awaiting the winners in the quarter-finals.
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