The Women's Super League's last 100 per cent record fell as leaders Birmingham City were held to a 1-1 draw at third in the table Chelsea.
Their advantage at the top has been cut to four points after second-placed Arsenal won 3-0 at Doncaster Belles.
Lucy Staniforth scored as Lincoln chalked up their first victory of the season, 1-0 at bottom club Liverpool.
That meant an all-Merseyside bottom two after Everton's draw with Bristol Academy saw them slide into trouble.
Chelsea 1-1 Birmingham City
A hard-fought tussle in front of 421 fans swung Chelsea's way when left-back Claire Rafferty scored direct from a 74th minute corner.
But Birmingham hit back quickly and eight minutes later levelled the scores as left-back Kerys Harrop struck her third goal of the season.
The visitors then almost snatched victory in stoppage time, right winger Karen Carney's goalbound shot bringing a superb save from keeper Carly Telford.
Doncaster Rovers Belles 0-3 Arsenal
Scotland midfielder Kim Little hit her first two WSL goals and almost finished with a hat-trick in a comfortable Arsenal victory watched by an attendance of 424.
England striker Ellen White opened the scoring with her third goal of the campaign, a header from a seventh minute corner by her international colleague Rachel Yankey.
Two minutes into the second half Little doubled the lead with a tremendous 18-yard volley and soon afterwards hit the crossbar.
Fellow Scot Julie Fleeting then struck the bar with a 68th minute header, but Little was on hand to force in the rebound.
Liverpool 0-1 Lincoln
Just as at Doncaster, the woodwork played a prominent part at Liverpool as both sides rattled the frame of the goal a couple of times.
Lincoln captain Casey Stoney twice hit the bar, while Liverpool's Nicky Harding and Cheryl Foster also sent efforts against the woodwork.
The crowd of 285 seemed destined to watch a goalless draw but, eight minutes from time, Lucy Staniforth headed home Jess Clarke's cross to give the visitors victory.
Everton 0-0 Bristol Academy
Everton's surprisingly low-key start to the season continued as they searched in vain for their first WSL win.
They dominated possession but, in front of 316 expectant supporters, they were unable to produce a goal to kick-start their campaign.
They are second from bottom of the table with four points from five games.