"Izzy was always a fast and creative fighter and unpredictable," Gallacher said yesterday.
"He had his own style, which was a lot more about controlling distance and avoiding shots. You can see now he is the perfect storm of talent and world class training.
"No doubt he will take out the world title this weekend," Gallacher predicted.
Adesanya has a formidable record and as of January 1 this year, he is ranked the No4 middleweight in the world by Combat Press and as of January 2 he is also ranked No4 by LiverKick.com.
Glory is the world's premier kickboxing promotion with events held across the United States, Europe and Asia, while Adesanya's bout will be broadcast live on cable sports giant ESPN in America.
It will also be broadcast on Sky Arena Channel 065 between 5pm and 7pm tomorrow.
The Style Bender, as Adesanya is known, secured his shot at the title after winning the four-man contender tournament in Denver two months ago, claiming decision victories over Robert Thomas and arch-rival Yousri Belgaroui on the same night.
Wilnis (29-6-1) will be making his first defence of the belt since recording one of the biggest upsets of the year with a third-round TKO over then-middleweight champion Simon Marcus in September.