Coach Tom Coughlin said he had no update on the two receivers, but he does hope to have defensive end Osi Umenyiora on the practice field for the first time since he underwent arthroscopic knee surgery on Aug. 19.
A source said it is unlikely that Umenyiora will play against the Eagles on Sunday, however.
"We certainly hope to see that Osi will be ready to go and we hope to have him on the practice field," Coughlin said.
It remains to be seen whether the Giants will have their second- and third-best receivers in practice as they prepare for their rematch with the Eagles.
Manningham took a hit toward the end of the first half Sunday. He said his neck "stiffened" up, and he failed sideline concussion tests. On Tuesday, he was going through a battery of tests as the necessary protocol for players who suffer a concussion or head injury.
Coughlin said the wideout appeared much more alert following the Giants win on Monday night.
"As far as I know, all the tests and all the protocol for a concussion are being conducted right now," Coughlin said in his afternoon conference call. "He was much clearer when he left the stadium last night and he was much more bright-eyed this morning when he was in. We will just wait and see what the doctor says after he finishes the exam."
Hixon said he injured his right calf on his sensational 22-yard juggling touchdown catch in the second quarter. But Coughlin said the team is examining his surgically-repaired right knee. Hixon tore his ACL last summer and the Giants held the receiver out after he briefly returned to the game following the touchdown in the third quarter.
"He too will be completely checked out," Coughlin said. "Dom came in after the half, he loosened up, he tried to go, there was still some look in his eye as to the discomfort factor and the lack of true feeling as if things are normal, so that is when he came off the field and the decision was made that he should not return."
Working on a short week, Coughlin said the Giants will not go through a full speed practice until Thursday. That is when he hopes to have Umenyiora, his Pro Bowl pass rusher, back in practice.
Umenyiora has been unhappy with his contract and he did not practice for the first couple of weeks of training camp.
The defensive end then participated in three practices before experiencing swelling in his knee and undergoing surgery on Aug. 19.
"Hopefully Thursday, Osi will be ready to practice," Coughlin said. "If there is not any type of setback then I would expect that."
Ohm Youngmisuk covers the Giants for ESPNNewYork.com.