Thurman sees clear strengths on both sides, but says Spence’s inactivity makes the fight difficult to predict.

“A lot of people see it as a 50/50 [fight]. Spence has [had] too big of a layoff – that’s the biggest question mark.

“When your layoff is long [and] no one’s seen you, they don’t know what version of you they’re gonna get.

“They’re going to analyse you off of your last performance – [and Spence’s] last performance was not that good.”

Thurman told MillCity Boxing.

Tszyu enters the fight after a difficult stretch that included losses to Sebastian Fundora and Bakhram Murtazaliev. Despite those defeats, Thurman believes the Australian has one important advantage over Spence.

“I think Tim Tszyu has the advantage of activity and then Spence has the advantage of pedigree.

“He’s been at another level; he’s achieved more [than Tszyu].

“But it’s a solid 50/50 [fight], because they both have some questions that need answers.”

Thurman said.

The matchup has become one of the more difficult fights to call on the July 25 schedule. Tszyu has been active despite his recent losses, while Spence remains one of the most accomplished fighters of his generation but has not competed in three years.

Thurman’s view is simple. Activity favors Tszyu. Experience and accomplishments favor Spence. Nobody knows whether the version of Spence returning in Australia will resemble the champion who unified the welterweight division or the fighter who was dominated by Crawford in his last appearance.