Michael Stewart's second-half penalty at Parkhead sent Hearts past Celtic 1-0 and into the semi-finals of the Co-operative Insurance Cup.

In the 58th minute Hearts midfielder Stewart scored from the spot after Hoops left-back Danny Fox had tripped Christian Nade inside the Celtic box.

Parkhead substitutes Paddy McCourt and Georgios Samaras both hit the woodwork and the Greece international missed several chances before captain Stephen McManus was red carded for a wild lunge at Andrew Driver with seconds remaining.

The home side almost went a goal behind within a minute when Jambos midfielder Ian Black played Nade in at the edge of the Celtic box with the home defence posted missing.

The Gorgie striker knocked his shot from 12 yards past Hoops keeper Lukasz Zaluska but Parkhead right-back Andreas Hinkel was perfectly placed to clear a couple of yards from goal.

Celtic wide-man Shaun Maloney found a yard when he played a one-two with Zheng Zhi but Gorgie keeper Janos Balogh coped easily with the low drive from 14 yards, minutes before Parkhead defender Gary Caldwell blocked a Driver shot following a Hearts corner.

In the 58th minute the Celtic fans were silenced when the visitors took the lead through a Stewart penalty.

With the Hoops defence again all over the place, the lunging Fox tripped Nade inside the box as the Frenchman drove in at goal and there were few appeals from the home side as referee Craig Thomson pointed to the spot.

Zaluska got his hand to Stewart's unconvincing penalty but failed to stop the ball making its way over the line.

In the second minute of added time Stephen McManus was red carded for a wild lunge at Andrew Driver, referee Thomson upgrading it from yellow on the advice of his linesman.