 Complete the following phrase:  Mancini debuted in Serie A for Bologna in 1981. The following year, he was bought by Sampdoria, for 2.2 million, whom he played for until 1997. With Sampdoria, he formed a dynamic strike partnership with Gianluca Vialli under manager Vujadin Boškov, which earned the pair the nickname The Goal Twins I Gemelli del Gol, in Italian. Together, they helped the club to its only league title in 