Women's Super League leaders Birmingham and home side Lincoln finished with 10 players in a feisty 1-1 draw.
The home side's Leandra Little and Birmingham substitute Heather Scheuber received their marching orders after each player had collected two bookings.
Third-placed Everton beat Arsenal 3-1 to hand the pre-season title favourites their second defeat of the campaign.
Chelsea remain fourth after a 2-1 win over Doncaster Belles while bottom side Liverpool lost 2-0 to Bristol Academy.
Lincoln 1-1 Birmingham
Defender Little started the game well, giving Lincoln the lead when she forced the ball home in a 13th minute goal-mouth scramble.
The Imps had the better of the first half, but Blues took control after striker Rachel Williams had equalised through a 49th-minute penalty.
Little saw red in the 65th minute after being shown two bookings in the space of 12 minutes.
Scheuber's double yellow came even quicker, her first in the 72nd minute and the second just five minutes later.
In what became an increasingly ill-tempered affair the total card-count was eight yellows and two reds.
Everton 3-1 Arsenal
After producing no victories their first five WSL outings Everton have now won four in succession.
The Toffees had to come from behind to beat the Gunners, who went ahead through England striker Ellen White after just four minutes.
But Everton equalised through Michelle Hinnigan's curled shot eight minutes before half-time and Amy Kane brilliantly shot them in front just before the hour.
Winger Toni Duggan completed the scoring with a fine 69th-minute volley to set her team up for what could be a late charge for the title.
Chelsea 2-1 Doncaster
Defender Sophie Perry headed in the Chelsea opener from England midfielder Dani Buet's 11th-minute corner.
Buet was the provider again for the second goal, crossing for midfielder Ashlee Hincks to glance a header in off the far post.
Doncaster halved the deficit on the stroke of half-time, midfielder Kasia Lipka driving home an excellent 20-yard shot.
But Blues had control for most of the second half and both Hincks and striker Helen Lander missed chances to sew the game up.
Liverpool 0-2 Bristol
Liverpool's poor season continued with a fourth defeat in five home matches as Wales midfielder Jess Fishlock bagged a brace.
She opened the scoring from a 12th-minute penalty after being brought down herself, then hit the victory clincher from Anouk Hoogendijk's 71st minute cross.