Errol Spence Jr. considers Terence Crawford’s victory over Viktor Postol the best win of Crawford’s career.

Postol appreciates Spence’s praise, yet the former WBC super lightweight champion can’t see Spence beating Crawford two weeks from Saturday night. Ukraine’s Postol predicted during an interview with BoxingScene.com not only that Crawford will win their welterweight title unification bout, but that he’ll beat Spence by knockout or technical knockout in their Showtime Pay-Per-View main event July 29 at T-Mobile Arena in Las Vegas.

“I think Terence Crawford will win easily,” Postol said through a translator. “He will stop Spence after six rounds, in the second part of the fight. Speed will be the difference. There is nothing that Spence can do to Crawford that he hasn’t seen before. Even if [Spence] gives him some trouble in the early rounds, Crawford will adjust and will do better, and I believe he will stop him.”

Postol had a lot of difficulty dealing with Crawford’s speed and other attributes during their 12-round, 140-pound championship unification fight in July 2016 at MGM Grand Garden Arena in Las Vegas. Crawford dropped Postol twice during the fifth round and outpointed him by wide distances on the scorecards of judges Guido Cavalleri (118-107), Dave Moretti (117-108) and Don Trella (118-107).

Crawford, who later became boxing’s first fully unified 140-pound champ of the four-belt era, defended his WBO junior welterweight title and won the WBC super lightweight crown from Postol.

In Postol’s previous fight, he upset Argentinean power puncher Lucas Matthysse by 10th round knockout to win the WBC 140-pound championship in October 2015 at StubHub Center in Carson, California.

Postol was undefeated (28-0) when he encountered Crawford.

Nearly seven years later, Postol (31-4, 12 KOs) will meet Dominican southpaw Elvis Rodriguez (14-1-1, 12 KOs) in a 10-round, 142-pound bout Saturday night at The Cosmopolitan of Las Vegas. Showtime will televise Postol-Rodriguez as its co-feature before lightweight contenders Frank Martin (17-0, 12 KOs) and Artem Harutyunyan (12-0, 7 KOs) square off in the 12-round main event of a tripleheader scheduled to start at 10 p.m. EDT (7 p.m. PDT).

The 39-year-old Postol will fight for the first time since his 10th-round TKO loss to Gary Antuanne Russell (16-0, 16 KOs) in February 2022 at The Cosmopolitan.

Two weeks later, Crawford (39-0, 30 KOs), of Omaha, Nebraska, and Spence (28-0, 22 KOs), of DeSoto, Texas, will fight for Crawford’s WBO welterweight title and Spence’s IBF, WBA and WBC championships in the 12-round main event of a four-bout broadcast ($84.99; 8 p.m. EDT; 5 p.m. PDT).

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