Plastic pitches have been outlawed in the Premiership going forward. That means Celtic’s trip to Rugby Park on Sunday will see veterans like Callum McGregor play on their grass surface for the first time. The Killie boss explained to Sky Sports that he is ‘excited’ at the prospect of welcoming the champions of Scotland to Rugby Park’s new grass surface. ⛔️ Celtic to play first on Killie’s grass surface. I am so excited because I think grass should be the way in the Premiership.