Etherington sustained a cracked ribin the first leg at the Britannia Stadium last Thursday - which the Potters won 1-0 - and missed a friendly at Sheffield Wednesday on Saturday, but has since returned to training.
Available: Etherington could be fit to face Hajduk Split
Jermaine Pennant, recently troubled by a thigh problem, is also expected to feature in the clash at Stadion Poljud, while Jonathan Woodgate could make his competitive debut after completing 45 minutes of the match at the weekend.
Provisional squad: Begovic, Wilkinson, Shotton, Huth, Shawcross, Woodgate, Collins, Wilson, Pennant, Whelan, Delap, Etherington, Jones, Walters, Whitehead, Diao, Pugh, Sorensen.
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