Percy Harvin (ankle) can't practice

EDEN PRAIRIE, Minn. -- The Minnesota Vikings will be without wide receiver Percy Harvin again this weekend because of his sprained left ankle, a team source told ESPN.

If Harvin was even close to healthy, he would play, the source said.

Harvin is listed as doubtful for Sunday's game at Chicago. He tried to test his foot with some pre-practice work on Friday, but coach Leslie Frazier said he couldn't put much weight on it.

Harvin sprained his left ankle at Seattle on Nov. 4 and didn't play against Detroit on Nov. 11. The bye gave Harvin last week to heal, but he still hasn't regained enough strength and mobility in the joint to rejoin the team. Harvin entered this week second in the NFL in total yards behind Green Bay's Randall Cobb.

Left guard Charlie Johnson and nose tackle Letroy Guion were listed as questionable with toe injuries.

Information from ESPN's Ed Werder and The Associated Press was used in this report.