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Sfera Sports Group is very happy to announce a new collaboration with Adam Siemienski and ΜVP Promotions. Our two sports management companies, with their experience in dealing in NBA & Euroleague, are expanding in Poland and Eastern Europe and the best is yet to come! CEO of Sfera Sports Group, Mr. George Sfairopoulos, met the CEO of MVP Promotions, Mr. Adam Siemienski, in Poland during the Final 8 Cup tournament in Warsaw.