Birmingham City goalkeeper Rebecca Spencer says they only have themselves to blame for their winless start to the Women's Super League season.
The 24-year-old accepted responsibility for Asisat Oshoala's opening goal in Liverpool's 2-1 win on Wednesday.
"We're our own worst enemy," Spencer told BBC WM 95.6.
"The first goal was probably my fault, I was trying to counter at the end of the first half and should have managed the game better."
From Spencer's attempted clearance in first-half stoppage time, Liverpool's Gemma Bonner sent the ball back with a long cross which African Women's Player of the Year Oshoala volleyed home.
African Women's Player of the Year Oshoala then set up a second for Fara Williams before Aoife Mannion gave Blues late hope.
"We pride ourselves on our defensive displays but those little lapse in concentration and mistakes we make are leading to goals.
"They didn't create many chances but were clinical with their finishing."
Birmingham boss Dave Parked called Spencer's clearance "absolutely criminal" and a moment from which they failed to recover from.
"It wasn't good enough in the end, I can't fault the players for their endeavour, but the quality just wasn't there," Parker said.
Birmingham's defeat came three days after they battled to a 0-0 draw with Manchester City, despite playing the second half with 10 players.