Kilmarnock manager Derek McInnes still feels his side were denied a crucial penalty against Celtic last season – but is optimistic he can enjoy cup success in the future with the Rugby Park side.

McInnes is preparing Kilmarnock for the Viaplay Cup last 16 tie against Celtic on Sunday and looking to build on a strong start to the season after defeating Rangers and drawing with Hearts.

The manager says he knows what it takes to enjoy success in the competition but admitted he’s still unhappy about a decision that denied his team an opportunity in last season’s League Cup.

Kilmarnock were 1-0 down to Celtic at Hampden in the semi-finals after Daizen Maeda had given the Parkhead side the lead but felt they should have had a penalty for a Giorgos Giakoumakis challenge on Joe Wright.

Their claims were denied and the Celtic striker went on to settle the tie with a 95th minute goal. McInnes hasn’t forgotten and is adamant that a clear penalty was missed.