Sjoeke Nusken's double helped Chelsea earn a comfortable win at Ajax and take control of their Women's Champions League quarter-final.
Ajax, who are competing at this stage for the first time, hit the post in the early exchanges but from then on Chelsea dominated to take control of the two-leg tie.
Lauren James opened the scoring after a through ball was intercepted but an attempted clearance rebounded off an Ajax defender into her path.
The England forward calmly rounded the goalkeeper to slot into the empty net, with the video assistant referee (VAR) awarding the goal after it was initially ruled out for offside.