Red Bull Salzburg: The hosts have no fresh injury concerns and could field the same 11 that lost at the Velodrome.
Marseille: Yohann Pele will start between the sticks with Steve Mandanda still not quite ready to return from a thigh injury. Defender Hiroki Sakai will also miss out with a knee problem.
Red Bull Salzburg boss Marco Rose:
"We dominated the first leg for long stretches, and actually had Marseille under control. It is definitely the case that things are possible for us in the second leg. We have the chance on Thursday to snatch the momentum back, and we want to put in another top performance in front of a full house.
"We need to set ourselves up for bringing maximum attacking power out onto the pitch and at the same time remaining patient. I had the feeling in Marseille that we were physically stronger and could have got more. We will try everything to overpower them and make them tired."
Marseille boss Rudi Garcia:
"OM play their 58th game of the season tomorrow but I am not sensing any physical or mental fatigue from my players. As we saw last week, we still have legs at the end of the game.
"If we can score a goal quickly, it will be difficult for them to come back from that but there is no ideal scenario: we have to win and qualify. What we have done so far is not enough to earn a place in the history of the club."
Did you know?
This is the first time both teams have reached the Europa League semi-finals.
Salzburg are undefeated in 10 European games at home (W7, D3).
Form:
Possible lineups:
Red Bull Salzburg: Walke; Lainer, Ramalho, Caleta-Car, Ulmer; Samassekou, Haidara, Berisha, Wolf; Hwang, Dabour.
Marseille: Pele; Sarr, Rami, Gustavo, Amavi; Lopez, Sanson; Thauvin, Payet, Ocampos; Mitroglu.