Former Celtic man John Hartson admitted he got it wrong as he revisited the Calvin Bassey offside decision.
The ex-striker was on punditry duty at the national stadium for the Hoops' Scottish Cup semi-final meeting with Rangers.
With the knife-edge derby in extra-time following goals from Greg Taylor and Scott Arfield, tensions were high when Bassey delivered a low ball that deflected off Carl Starfelt and into the Celtic net.
