Hixon eventually walked off the field under his own power during the public practice at New Meadowlands stadium.
Hixon's foot got caught in the new turf at New Meadowlands Stadium, Coughlin added.
Hixon initially fell to the ground, clutching his knee after making a cut during the return. There was no contact with any other players. He got right up and tried to walk before collapsing. He was tended to by trainers immediately and got to his feet after about two minutes.