Since Cris ‘Cyborg’ Santos defeated Gina Carano in the summer of last year to become Strikeforce’s first woman’s middleweight champion questions have been asked over who could offer the dominant Brazilian a serious challenge.

Ther’s no definitive answer to that, but one name that has cropped up time and again is former boxer turned MMA fighter Erin Toughill.  Holding a record of 10-2-1, including wins over Cyborg’s most recent victims Marloes Coenen and Jan Finney, she is considered a worthy adversary for the champion.

Unfortunately getting Toughill into the cage has proven to be a challenge.  After a series of call-offs and rumored friction between the temperamental fighter and Strikeforce, many have wondered whether the fight will ever take place.

Having spent over a year on the sidelines Toughill was expected to get a tune-up fight with Shana Olsen on August 21st at Strikeforce: Houston, with the winner going on to fight Cyborg.

At the end of last week Toughill revealed on her Facebook page that she was struggling to make weight for the 145lb bout despite the fact that the bout was still a month away.  Today Strikeforce officially confirmed with MMAJunkie that the fight has now been canceled.

If Toughill can’t make the weight then it seems that Strikeforce are wasting their time promoting her as a viable title challenger for Cyborg, and you have to wonder when Scott Coker and Co. will run out of patience with her.

The catch is that there’s just not many other competitive fights out there for their 145lb champion at this moment in time so it’s still possible they could compromise and put together a catchweight non-title bout between the two at some stage.

As of today though both Toughill and Strikeforce are remaining quiet in regards to what comes next.