Timothy Weah scores a debut goal and Celtic ease through to the the 5th round with a comfortable 3-0 win. The only debatable issue centred again on a refereeing gaffe, an offside decision that denied Sinclair of a "hat trick" and taking ownership of the match ball. His goal was clearly onside (not even close to offside!) and I question the competence of the AR who raised his flag! I've officiated games in days gone by and "ran the line" occasionally - I wouldn't get that decision wrong unless I guessed and was not concentrating on the game!!! Scottish refs and ARs need to improve their damaged reputation but how???