Revolution Notes: Injury updates, GK job is Knighton’s to lose, Chelsea friendly scheduled, more from Gillette

FOXBOROUGH — Revolution manager Brad Friedel said Tuesday morning that defender Michael Mancienne is "day-to-day" following a pre-match back injury that yanked him from the season-opening starting XI in Dallas Saturday.

Jalil Anibaba, who was listed as starting on the bench when the lineups were released at about 3:40 p.m. ET, replaced Mancienne in the lineup, which then left the Revs with no back line defensive options on the bench for the match against FCD, a 1-1 draw.

NBC Sports Boston had shown video of head athletic trainer Evan Allen helping Mancienne off the pitch, with the Englishman holding his lower back in the area of his oblique.

Friedel wouldn’t confirm if it was Mancienne’s oblique.

“I’m not a doctor,” he said.