Andrea Agnelli, one of the architects of European football’s controversial Super League, is launching a comeback as a sports investor. Five years after his failed attempt to upend the continent’s footballing landscape, Agnelli has established Gamma Waves Partners, an investment firm that will target opportunities in innovative sports competitions and formats, as well as teams and athletes. Based in Amsterdam, where Agnelli now lives, Gamma Waves will manage money invested by the former Juventus boss and co-founders including Rocco Benetton of the eponymous fashion dynasty and former Italian football captain Giorgio Chiellini. Agnelli acted as vice-chair of the European Super League, a closed league for the continent’s biggest clubs. The project collapsed in 2021 within days of becoming public knowledge after a backlash from supporters and politicians forced clubs to pull out. His new venture will take minority stakes in businesses seeking to boost fan engagement with s...