[Kansas City.com] San Francisco tight end Vernon Davis, whom Chiefs coach Todd Haley complimented Wednesday as one of the league’s best at his position, all but guaranteed that the winless 49ers would defeat unbeaten Kansas City when the teams meet Sunday at Arrowhead Stadium.

“We have to win this one. We will win this one,” Davis said during a conference call with Kansas City reporters. “I’m pretty confident that we will pull this one out.”

Davis, a fifth-year player, was then asked whether he was guaranteeing a San Francisco win, and he didn’t retreat.

“We will win this game. We have the team to do it,” he said. “We’ve just got to get rid of all the mistakes. Without the mistakes, there’s no telling where we can go. There’s no limit.”

As often happens, word spread quickly through the Chiefs’ locker room that Davis had promised a win. Defensive lineman Shaun Smith is the team’s loudest trash talker, and he was – ”as best as can be” – reserved when told about Davis’ comments.

“That’s just Vernon Davis being Vernon Davis,” Smith said. “You know him. … That’s just a guy trying to get some locker-room talk, some locker-room chatter. That’s also a guy trying to get his team going.”

“For him to put out there on line, guaranteeing victory, that’s him. We’ll see what happens on Sunday.”