Why are Barcelona playing Manchester City? Camp Nou to host charity match between European giants

The European powers are getting together for a charity match to support a former assistant coach of Pep Guardiola's, with the match dubbed "A Great Game for a Greater Cause."

source https://www.sportingnews.com/us/soccer/news/why-are-barcelona-manchester-city-playing-charity-match/e7ct8ipriugd1bmsl74qcxzc