sentences:  In the following off-season he signed with fellow top-divisioner U.C.Sampdoria, where he remained for the following 15 years almost always as an undisputed starter; in the late 1980s/early 1990s he was part of a defensive sector which also included Gianluca Pagliuca, Luca Pellegrini, Pietro Vierchowod and Amedeo Carboni, with Roberto Mancini and Gianluca Vialli providing the goals.During his spell with "Samp", Mannini won four Coppa Italia and the 1991 national championship, scoring a crucial goal in the latter competition on 19 May in a 3–0 home win against U.S. Lecce.