Chelsea were held to a goalless stalemate by Hacken in the Women's Champions League on Tuesday, while Manchester City earned a first win of the competition.
The London club hit the woodwork twice in Sweden as an inspired showing by Hacken goalkeeper Jennifer Falk also helped keep the visitors at bay.
Chelsea are third in the league phase table after four matches, one point behind defending champions and pacesetters Barcelona, although the perfect Catalans hold a game in hand.
However, several teams, including Lyon and Arsenal -- both of whom are just a point behind Sonia Bompastor's side -- could leapfrog them this matchday.
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"It's a frustrating result," Blues boss Bompastor told UEFA.
"We came here with the ambition of winning the game... But tonight it didn't go that way. We need to learn from this."
Women's Super League champions Man City enjoyed a 4-1 success at Inter Milan to earn a first win in the league phase after drawing their first three outings.
A first-half Aoba Fujino brace cancelled out Elisa Bartoli's opener for the hosts by half-time.
Kerstin Casparij and Grace Clinton were on target after the break to send City up to seventh in the table.
