Rangers manager Giovanni van Bronckhorst was left unhappy at one decision prior to Celtic's opener in Saturday's 4-0 Glasgow Derby defeat, Sky Sports report. 

The Lowdown: Derby defeat

Van Bronckhorst made two changes from his side at Celtic Park, with Glen Kamara and Steven Davis coming in for Tom Lawrence and Scott Wright.

However, it was the hosts who ran riot in the first half, with two goals from Liel Abada and one from Jota leaving Van Bronckhorst's side with a mountain to climb in the second half. Jon McLaughlin's error in the closing stages resulted in the hosts netting a fourth through David Turnbull.

The Latest: Sky Sports post

Sky Sports provided a live commentary feed from Celtic Park and spotted Van Bronckhorst unhappy and in furious conversation with the fourth official following Abada's opener.

The Rangers boss appeared to be complaining about the decision to award Celtic a throw-in shortly before the goal. Replays show that Van Bronckhorst was wrong and the officials were in fact right, though, with Sky Sports co-commentator Andy Walker hailing 'Jota's quick thinking'  for being 'key to the goal'.

The Verdict: Afternoon to forget

Just like in February, the result was decided in the first 45 minutes. It was certainly another trip across Glasgow to forget for Rangers, who are now already five points behind their rivals after six games.

On another day, decisions could go in Rangers' favour, however, it's fair to say that Ange Postecoglou's side were the better side, giving Van Bronckhorst food for thought going forward.