Yahoo Sports reports: A combination of Calvin Harris concerts and Commonwealth Games events are forcing Celtic to play the opening game of its Scottish Premiership title defense on a Monday night, a situation the club has described as “disappointing.” Instead of being played on the previous Saturday or Sunday, Celtic's home meeting with Dundee has been pushed back to Monday Aug. 3. “We have been told that there is no choice owing to Police Scotland being unable to support the fixture on a weekend which coincides with other events,” Celtic said.