The Croat scored and played the full 90 minutes in a behind-closed-doors friendly against Charlton.
He said: "I played 90 minutes after a long time which was very good for me and of course I'm glad to score a goal, but it's only a friendly, so it doesn't count for too much.
"I feel better and better each day and I don't think it's long before I will feel 100 per cent fit.
"I hope to be involved (against Manchester City) but it's the manager who decides and we will see."
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