Celtic's Celya Barclais scored a crucial late goal to secure a draw for her team after falling behind 2-0 against Scottish Women's Premier League leaders Rangers.
It was a blistering start from Rangers, who were fired into an early lead thanks to a stunning volley from Kirsty Howat in the fifth minute.
Tessel Middag thought she had doubled the lead for her side moments later, only to see her celebrations cut short by the offside flag.
Rio Hardy was deemed to have been obstructing Kelsey Renee Daugherty's view in the Celtic goal for the second, although the opener also involved a similar situation with the same player.
The second half was sparked into life with two quick-fire penalties, as both Katie Wilkinson (64) and Saoirse Noonan (69) slotted the ball away with ease from the spot.
TrendingThe latter scored with virtually her first touch off the bench and it was another substitute who netted the equaliser, as Barclais was first to react in the box to lash her effort into the bottom left corner in the 87th minute.
Rangers had conceded just one goal prior to this game but saw two fly past Victoria Esson in less than 20 minutes, as the points were shared in the Old Firm derby.
Celtic's Saoirse Noonan speaking to :
"We could have still won at the end but it was a great team effort. We could have snuck three points after that one.
"We could hear both fans and that is what football is about. They are both going at each other but it's a great game for women's football. It was another great test for us. We haven't lost yet."
Rangers boss Jo Potter speaking to :
"Comedy of errors for the first one. It's on us. You have to manage those moments better.
"We are extremely disappointed not to take three points today. I don't have an opinion on any referee decisions. You're in the Old Firm, you have to manage games.
"A lot of decisions that I'm scratching my head with."
It's a quick turnaround before the next fixture for Potter's side with Rangers Women hosting Motherwell Women on Saturday.
Meanwhile, Celtic will have an extra two days of rest before their next game against FC Twente Women on in the Champions League on Tuesday.