Chinese property and entertainment giant Dalian Wanda Group Co. is buying Swiss sports-marketing company Infront Sports & Media AG for 1.05 billion euros ($1.2 billion), a move that adds a new business to the Chinese company’s entertainment holdings. The acquisition will help its presence in sports in China and increase Wanda’s influence in global sports, the Chinese company said at a Beijing press briefing on Tuesday. Zug, Switzerland-based Infront oversees media and marketing rights for international sports events and organizations. Infront President and Chief Executive Philippe Blatter — who is the nephew of FIFA President Sepp Blatter — said the deal will help it boost investments and improve its offerings in sports. An expanded version of this report appears on WSJ.com.