Anthony Joshua appreciates that a neutral panel of judges have been assigned to work his rematch against Andy Ruiz Jr. on Saturday night.

Joshua just doesn’t think their scorecards will impact the result of their second fight. The former IBF/IBO/WBA/WBO heavyweight champ can’t envision his second fight with Ruiz going the distance.

Six months after suffering a stunning, seventh-round, technical-knockout loss to Ruiz, the British superstar expects to return the favor at Diriyah Arena in Diriyah, Saudi Arabia. Joshua predicted a knockout victory Tuesday following an open workout in Diriyah.

“You’re gonna see fireworks,” Joshua told Sky Sports after doing some shadowboxing in the ring. “I’m gonna be victorious. We’re gonna trade leather. And, as I said, this ain’t going 12 rounds.”

Joshua, who was more than a 20-1 favorite, briefly seemed as if he’d knock out Ruiz in their first fight June 1 at Madison Square Garden in New York.

The 6-feet-6, 247¾-pound Joshua dropped Ruiz with a left hook 43 seconds into the third round. Ruiz hadn’t been dropped during any of his first 33 professional fights, and he appeared stunned when he went down to the seat of his trunks.

Ruiz recovered quickly and wobbled Joshua with a left hook just 26 seconds after he went down. He then sent Joshua to the canvas by dropping a right hand on the top of Joshua’s head.

A determined Ruiz floored Joshua again late in the third round and twice in the seventh round. Referee Michael Griffin waved an end to their scheduled 12-rounder 1:27 into the seventh round because Joshua didn’t respond properly to Griffin’s command to move forward, out of his own corner.

The 30-year-old Joshua (22-1, 21 KOs) expressed confidence Tuesday that he has made improvements in training camp necessary to avenge his lone loss versus Ruiz (33-1, 22 KOs).

“It’s about being confident, about knowing your capability,” Joshua said. “I’ve had a great training camp, well prepared, and [I’ll] just showcase my skills.”

When asked how much he has changed since Ruiz upset him, Joshua replied, “I’m forever changing. That’s what training camp’s about, evolution, and [it’s] like night and day. … I’ve shedded some skin [from] last time, rebuilt myself. And all I’m doing is I’m gonna win. That’s what I’m focused on.”

Joshua, of Watford, England, and Ruiz, of Imperial, California, will meet again Saturday in the main event of a Sky Sports Box Office pay-per-view event in the United Kingdom (5 p.m. GMT; £24.95 in HD). Their second bout will headline DAZN’s stream in the United States (noon ET/9 a.m. PT).

Keith Idec is a senior writer/columnist for BoxingScene.com. He can be reached on Twitter @Idecboxing.