Stefan Johansen returns to the Celtic squad for Sunday's Sky Live Scottish Cup clash with Morton after being rested against Dundee in midweek.

Fellow-midfielder Nir Bitton remains a doubt after missing the last two games with a knock and will be give a late fitness test.

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Dedryck Boyata is free to play in the quarter-final despite losing his appeal against his New Douglas Park red card but fellow centre-back Jozo Simunovic remains out with a knee injury.

Celtic manager Ronny Deila will be demanding an emphatic display to silence the doubters after indifferent displays in the last two league games turned up the heat on the Norwegian.

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This will be Morton's fourth away game of the competition; they won 4-1 at Annan last time out having beaten Livingston and Albion Rovers in previous rounds.

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They are managed by former Celtic player Jim Duffy and number former Celtic youth striker Denny Johnstone - currently on loan from Birmingham - in their ranks. He has scored eight goals in 26 appearances this season, including one in the 2-0 third round win at Albion.

Watch Celtic v Morton live on Sky Sports 2 HD on Sunday from 11.30am.