Celtic against Manchester United is an iconic fixture in the minds of many despite the two clubs only playing each other four times competitively in their long histories. When I think of the Old Trafford side facing off against the Bhoys, it’s impossible not to instantly envision Shunsuke Nakamura’s glorious free-kick at Celtic Park or Artur Boruc’s dramatic late penalty save. However, I also think back to a foggy night in 1995 that honoured Paul McStay for his testimonial during a period of regular friendly meetings between the two clubs. As a young supporter that felt like a big night in its…