Several former England youth internationals such as Sone Aluko, Victor Moses, Shola Ameobi, Alex Iwobi and Ola Aina swapped allegiances to Nigeria.
Also Liverpool’s Sheyi Ojo had in recent interview told the BBC that he would love to represent Nigeria if they approached him.
Should Lookman opt for the Super Eagles, he would face competition from Ahmed Musa, Moses Simon, Henry Onyekuru and Samuel Kalu for a place in the current squad.
“Every coach wants options, we’ve been lucky to get some players and if we get him, Lookman will give us more options,” Rohr explained.
“But we have to be careful about how we go about this because Nigeria have some good players at home and playing outside.”