Arsenal and Barcelona will face each other in the last 16 of the Champions League this season.
The first leg of the tie will be played at the Emirates Stadium in North London on Tuesday evening, with the second leg to be held at Camp Nou in Barcelona on March 16.
This is the third time in six years that Arsenal and Barcelona will face each other in the Champions League.
Johnstone, who played for Rangers in the 1970s and 1980s and is a club legend, believes that it is a turnoff that the two clubs are facing each other quite regularly.
The former Scotland international is also not a fan of the formation of a European Super League comprising of 20 top teams from Italy, England, Spain, Germany and France.
“Rangers may not be ready to challenge for a place in the top competition in European football yet, but that is the level (Champions League) we want to see the club get back to once again in the future,” Johnstone wrote in The Glasgow Evening Times.
“Hopefully we won’t have that chance taken away from us. Clubs from outside the top leagues are right to be worried about the proposal that would see some teams guaranteed a seat at the top table.
“All the big clubs, who are greedy in the first place, are now getting together. It is all about the money and they are afraid of missing out. They want the biggest sides to play each other all the time, but people will get fed up of it.
“How many times have Arsenal played Barcelona in the last few years? It is great once every so often, but when it happens as frequently as it has then it is a turn off.”
While Johnstone does have a point about the so-called European Super League, perhaps it is not right to claim that people will get fed up watching big sides play each other all the time.
Arsenal against Barcelona is one of most anticipated ties in the Champions League this season.
While Barcelona are widely claimed to be favourites, neutral fans will be looking forward to this game due to the hugely entertaining football played by the two teams.