"Nnamdi has whiplash-type symptoms and a split lip. He didn't have a concussion. He's been tested. Everything's OK there," coach Andy Reid said Tuesday. "He wasn't knocked out. That's not what happened when he was hit. He was completely conscious the whole time. But he did get a pretty good laceration to his lip and the back of his neck is a little bit sore."
Reid said he wasn't sure when Asomugha would be able to return to practice.
"I don't know. We'll see here. He's sore today, so he won't practice today, but we'll see," Reid said. "Day by day, we'll just take it and see how he does."
Asomugha, signed as a free agent last year after spending his first eight seasons with Oakland, was injured on a pass play during a seven-on-seven period.
"Just one of those plays," Allen said Monday. "It happens sometimes. His helmet went into my chest and my forearm caught him a little bit. It happened so fast, it's hard to tell what hit what."
Allen remained on the ground for a few minutes, coughing. But, ultimately, he was able to continue practicing.
Asomugha remained face-down and motionless as team trainers came to his aid and several teammates knelt around him. It was several minutes before he was able to regain his feet. He then made his way to a nearby cart and was driven to a fieldhouse adjacent to the practice field, where he was evaluated.
Asomugha, named to three Pro Bowls while with the Raiders, had 48 tackles and three interceptions in his first year with the Eagles.
Information from The Associated Press was used in this report.