wintertravel1980 cases in Scotland didn't start decreasing 5 days after the last match on the 22/06.
The peak by reporting date was 01/07. By specimen dates, 28/06 - 3,930, 29/06 - 3,893, 30/06 - 3,929.
Those dates are 5 days after the majority of schools finished, between the 23/06 and 25/06.
Also of note, unless finishing school, pupils in exam years are back in school, post exams, till the end of term, to start their higher/advanced higher courses.
Football had an effect, especially amongst young males, but it's school, maybe helped by dry, warm, un-Scottish weather.