Ben Thompson goes straight into the Pompey side to face Oxford at Fratton Park this afternoon.
Kenny Jackett has made six changes from the side that exited the Carabao Cup on home soil earlier in the week.
Craig MacGillivray returns between the sticks, while there are also starts for Jack Whatmough, Lee Brown, Ronan Curtis and Oli Hawkins.
Luke McGee, Christian Burgess, Brandon Haunstrup, Ben Close, David Wheeler and Brett Pitman all drop to the bench.
Pompey: MacGillivray; Walkes, Whatmough, Clarke, Brown; Evans (c), Naylor, B.Thompson; Lowe, Hawkins, Curtis
Subs: McGee, Burgess, Haunstrup, Close, Wheeler, Chaplin, Pitman