Complex sentence: Betting in a young and inexperienced coach payed dividends as Villas-Boas led the club to a record-matching four titles in a single season, including victory in the 2010--11 UEFA Europa League.
Split into simpler sentences: Betting in a young and inexperienced coach payed considerable dividends, as Villas-Boas led the club to a record-matching four titles in a single season. Widespread success in domestic competitions was replicated in the European stage, with victory in the 2010--11 UEFA Europa League.