​Coming off back-to-back defeats, Celtic cannot afford another loss this weekend. Unfortunately, there is no easy fixture for them to regain a bit of confidence.They will take on the Rangers again, merely a week after that 3-0 defeat at Ibrox. It goes without saying that the performance will need to be significantly better than what we have seen lately.Celtic simply have not been good enough. There are no two ways about it. And no hiding from that fact.Martin O’Neill will surely be hoping that the Bhoys are able to take advantage of the home environment this time round, although that did not count for much against Ferencvaros in midweek in their Europa League opener.When they take on the Rangers at Parkhead at the weekend, someone familiar will have the whistle. It is not a name that is expected to please Celtic fans though.Scottish FA announce officials for Celtic vs Rangers at ParkheadThe Scottish FA have announced that John Beaton will be the referee when Celtic take on the Rangers at Parkhead this weekend in Scottish Premiership action.He will have David McGeachie and Jonathan Bell as his two assistants. Nick Walsh will be the one on VAR duty, with Grant Irvine as his assistant. Ryan Lee has been named the fourth official.We do not need to go into detail about why Celtic fans might not be happy to see Beaton get the nod, especially during this difficult run of form for the team.It goes without saying that the fans will be hoping that there are no match-altering refereeing decisions on the day.That being said, refereeing calls often end up being front and centre when it comes to Glasgow derbies. So, it would not come as a real surprise if that turns out to be the case once again.Derek McInnes Drops Major Update Right Before Celtic Face RangersDerek McInnes has dropped a major update right before the Rangers face Celtic at Parkhead this weekend.Celtic need to raise their gameAt the end of the day, Celtic have a lot more to be worried about than who the referee is going to be at the weekend.Their own performances have been nowhere near the mark in recent weeks. If it keeps up like that, they will struggle to get a result, no matter who the referee turns out to be.There are a number of players who have been nowhere near the mark in recent times and need to raise their game.As for the coaching team, they need to make better decisions as well. Otherwise, it won’t take long for this season to unravel, just like the last one. And there won’t be any O’Neill to save them this time around, because he is the one struggling at the moment.