O'Dea remained behind in Glasgow for treatment on a hamstring injury but manager Neil Lennon is hopeful fellow defender Glenn Loovens will shake off a groin problem in time for the match in Portugal.
New signing Gary Hooper goes straight into the squad but is not match-fit, Aiden McGeady has recovered from a thigh knock while Niall McGinn did not travel as he continues to nurse a broken foot.
Hoops (from): Zaluska, Juarez, Cha, Wilson, Mulgrew, Loovens, Hooiveld, McGeady, Brown, Ledley, Crosas, Maloney, Samaras, Fortune, Hooper, Murphy, McCourt, Rasmussen, Cervi.
