Croatia: Ante Cacic may have to do without striker Mario Mandzukic, who is a doubt for the game with a hamstring injury, whilst defensive midfielder Milan Badelj will definitely miss the match after sustaining a rib injury.
Greece: Roma defender Kostas Manolas is suspended for the first leg after being accused of deliberately trying to pick up a booking in the qulifying win over Cyprus. Experienced right-back Vasilis Torosidis and Borussia Dortmund centre-back Sokratis Papatathopoulos are also doubts for the game with muscle and ankle problems respectively.
Did you know? Croatia have qualified for a major international tournament four times via the play-offs.
Possible line-ups:
Croatia: Subasic, Vida, Mitrovic, Lovren, Vrsaljko, Brozovic, Rakitic, Modric, Perisic, Kramaric, Kalinic.
Greece: Karnezis, Retsos, Papadopoulos, Tzavellas, Stafylidis, Zeca, Tachtsidis, Christodoulopoulos, Fortounis, Mantalos, Mitroglu.
The thoughts of Croatia winger Ivan Perisic:
"The Greeks will certainly be defensive and try as hard as they can to keep a clean sheet, but we have enough up our sleeve up front in an effort to swing the tie our way here in Zagreb," he told the Croatian FA's website.