The young Welsh side will face Ireland or South Africa for the fifth place final on Sunday if they secure a victory over Fiji. This will be the fourth game the Welsh squad will play in 13 days.
Wales head coach Richard Webster said: "We will have to produce a structured, disciplined game against the Fijians if we are to come out on top. They will be strong and physical and there's nothing they like better than a loose and open game so we will have to be intelligent in our tactics tomorrow evening."
Scarlets' Dale Ford is among a number of changes made by Webster in order to manage the squad's injury and game time. Young Scarlets hooker Kirby Myhill is ruled out with an injury (ribs).
Wales v Fiji: Wednesday 22 June, Stadio Plebisctio, Padua, 6pm local time.
Ross Jones (Ospreys / Bridgend), Liam Williams (Llanelli), Dale Ford (Scarlets / Llanelli), Lewis Robling (Dragons / Newport), Eli Walker (Ospreys / Swansea), Matthew Morgan (Ospreys / Swansea), Lewis Jones (Blues / Pontypridd), Rhodri Jones (Scarlets / Llanelli), Jamie Sollis (Dragons / Cross Keys), WillGriff John (Blues / Pontypridd), Macauley Cook (capt, Blues / Cardiff), Cory Hill (Blues / Pontypridd), Edward Siggery (London Irish), Luke Hamilton (Blues / Glamorgan Wanderers), Ben Thomas (Ospreys / Bridgend)
Replacements: Lewis Smout (Blues / Pontypridd), Will Taylor (Ospreys / Swansea), Owen Sheppeard (Blues / Pontypridd), Thomas Young (Blues / Cardiff), Jonathan Evans (Dragons / Newport), Steve Shingler (London Irish), Rheon James (Scarlets / Carmarthen Quins).