The 42-year-old Australian had only seven professional fights before facing Shields and had never encountered anyone near her level. Once Shields began increasing her output, the difference in speed and skill became impossible for Scott to overcome.

Shields hurt Scott badly with a left hook in the sixth and followed up as she retreated to the ropes. The referee stopped the contest with Scott under heavy fire, giving Shields only the fourth knockout of her professional career.

It was a decisive finish, but Shields beating Scott was hardly surprising.

Dropping from heavyweight to middleweight gave Shields access to another set of championships, not necessarily better competition. She had already conquered the division earlier in her career before moving upward in search of new challenges.

Now she’s back, and the same shortage of credible opposition remains.

That’s the difficulty with Shields’ career at this stage. Winning belts in multiple weight classes strengthens her list of accomplishments, but moving through divisions doesn’t automatically create compelling fights. Eventually, another championship becomes less interesting than finding someone capable of forcing Shields to make adjustments.

Scott couldn’t do that.

She competed during the early rounds and didn’t simply retreat into survival mode, but Shields gradually broke through with faster combinations and stronger punches. Once Scott was hurt in the sixth, there was little reason to believe she was going to recover and turn the fight around.

Shields improved to 19-0 and reclaimed two of the middleweight titles she once owned. The accomplishment gives her more hardware, yet the more interesting question has nothing to do with belts.

At 31, Shields still has plenty of career left. What she needs is an opponent with enough ability, experience and physical strength to create uncertainty.

Without one, Saturday’s result risks becoming the template for her middleweight run: Shields arrives as an overwhelming favorite, dominates someone badly overmatched and collects another championship.

Finding a fighter capable of changing that formula is now more important than finding Shields another belt.