San Francisco 49ers middle linebacker Kwon Alexander (56) looks across the line of scrimmage during an NFL football game against the Washington Redskins, Sunday, Oct. 20, 2019, in Landover, Md. (AP Photo/Mark Tenally)

SANTA CLARA — Under normal circumstances, the 49ers would blow out the Arizona Cardinals.

The 49ers have a complete team —they’ve built it up the past three seasons. The Cardinals have an incomplete team — they’re rebuilding with rookie head coach Kliff Kingsbury. They’re at least two seasons behind the 49ers.

But the game will be in Arizona. Advantage: Cardinals. And the game will be Thursday night, meaning neither team practiced much this week. And neither team is fully rested and prepared.

“Guys coming off a Sunday game to play on Thursday is just a terrible turnaround,” Richard Sherman said. “Obviously, guys have gotten hurt during those games.”

Guys such as Sherman. He tore his Achilles tendon during a Thursday night game in 2017.

Funny things happen on Thursday night. The better team doesn’t always win. This game could be much closer than most expect.

Here’s what the 49ers must do to win.