Video: Celtic denied clear penalty but overcome referee Gavin Duncan to go three points clear in title race

Celtic overcame an inept performance from referee Gavin Duncan to scramble their way to a 3-2 win over Dundee. 

The win puts Celtic three points clear at the top of the table but it required an 86th minute winner from Giorgos Giakoumakis to secure the victory. 

After falling behind to Danny Mullen opener in the 26th minute the Greek striker netted in the 34th and 38th minutes to the relief of the home support. 

Two minutes from the break Giakoumakis was moving on to a cross when he was savagely struck by the shoulder and upper arm of Vontae Daley-Campbell in full view of Duncan. 

Incredibly the referee failed to point to the penalty spot, with the intent shown the Dundee defender could well have been given a red card. 

Dundee were back on level terms on the hour mark when Ryan Sweeney headed home from a free-kick that should have been dealt with by the Celtic defenders. 

Four minutes from the end Giakoumakis headed home a near post header from a Liel Abada cross to take the spotlight away from a sub-standard performance from the referee.