The 33 year-old, off contract in June, has talked up moving to England next year, where Everton are keen.
But Nagelsmann told Sky Deutschland: "All the names available to strengthen the team must be carefully evaluated. And I can assure you that we will.
"Khedira? He would be an excellent player for many European clubs given his experience, his ability to be a leader for having played in teams like Real Madrid and Juve.
"It is bad to see him on the fringes of the Juventus squad."