On a play late in the fourth quarter of Sunday's game, Chung came down hard and immediately grabbed his right ankle. He stayed in the game, but later missed one play. He was replaced by Sergio Brown, who committed a defensive pass interference penalty. Chung then returned for the final three defensive plays of the game, including the Giants' go-ahead touchdown.
"I don't know what happened," Chung said after the game regarding his injury. "The pain's kinda gone away for now. I'm all good."
Spikes suffered a sprained MCL in his knee in Sunday's loss to the Giants. He is considered week to week, and would likely be replaced by Gary Guyton in the base defense if unable to play on Sunday night in New York.
Nine others were limited for the Patriots, including cornerback Kyle Arrington (foot), linebacker Guyton (shoulder), and wide receiver Wes Welker (ribs). All three were new injuries. Welker was limited by a neck injury in practice last week.
Also limited at practice were defensive end Shaun Ellis (ribs), running backs Kevin Faulk (knee) and BenJarvus Green-Ellis (toe), linebacker Jerod Mayo (knee), wide receiver Taylor Price (hamstring) and offensive lineman Sebastian Vollmer (back).
Chung's absence at practice, coupled with Josh Barrett being placed on injured reserve on Wednesday, left the Patriots with just two full-time safeties in practice: James Ihedigbo and Brown. Rookie cornerback Sterling Moore, who was promoted from the practice squad on Wednesday, also is considered an option at safety.
Spikes suffered a sprained MCL in his knee in Sunday's loss to the Giants. He is considered week to week, and would likely be replaced by Guyton in the base defense if unable to play on Sunday night in New York.
ESPNBoston.com's Mike Rodak and Chris Forsberg contributed to this report.