Connor Coyle and Armel Mbumba-Yassa don’t have similar styles, but Austin “Ammo” Williams doesn’t see a much different degree of difficulty in Coyle’s late replacement.

Mbumba-Yassa (10-0, 7 KOs), a native of The Republic of Congo, seems limited, from what Williams (15-0, 10 KOs) has seen. If nothing else, Mbumba-Yassa is ambitious, as he stepped in for Northern Ireland’s Coyle (20-0, 9 KOs) as the heavily favored Williams’ opponent Saturday in Las Vegas on less than one week’s notice.

Coyle was scheduled to square off with Williams in a WBA elimination match, but he suffered an elbow injury and withdrew from their 12-round fight late last week. Williams-Mbumba-Yassa isn’t an eliminator because Mbumba-Yassa isn’t ranked among the WBA’s top 15 contenders in the 160-pound division.

On paper, Mbumba-Yassa will also face the most imposing opponent of his four-year professional career. The left-handed Williams, a Houston resident raised in Milwaukee, intends to make Mbumba-Yassa aware of that reality immediately in the 10-round co-feature before England’s Connor Benn (22-0, 14 KOs) battles Bronx native Peter Dobson (14-0, 9 KOs) in the main event – a 12-round, 151-pound bout.

“I’ve watched him fight,” Williams told in reference to Mbumba-Yassa. “He’s a somewhat athletic guy, not totally athletic. … He’s taking a major step up and it’s gonna show. Like I said in the press conference, it’s gonna be about a minute and 30 seconds into the first round, when the jitters are off and he’s throwing his fastest punches and he’s settled into the fight and he’s got hit a few times, you’ll see a completely different demeanor in him than how he comes out at the opening bell.”

Mbumba-Yassa, 28, has fought almost exclusively in Germany, where he resides, since he made his pro debut in April 2019. While undefeated, he has beaten only two opponents who took winning records into their fights.

“He’s a completely different style than Conor Coyle, I mean totally,” said Williams, who is ranked third by the WBA, fifth by the WBC and sixth by the IBF. “But all I have to do is dig into my toolbox, as far as what he’ll be. He’s a shorter guy, he’s athletic, he fights in spurts. He doesn’t have good feet and he’ll try to tee off combinations here and there, then move around on the inside. All I have to do is just change my mindset, as far as the type of fight that I wanna fight or the style that works best against somebody like him.”

The 27-year-old Williams, who is promoted by Eddie Hearn’s Matchroom Boxing, is listed by DraftKings sportsbook as a 40-1 favorite to beat Mbumba-Yassa. Their bout will be part of a four-fight DAZN stream scheduled to begin at noon PT (8 p.m. GMT; 3 p.m. ET).

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