Federico da Montefeltro
At the death of his uncle, Malatesta Novello (1465), he captured Cesena. Soon Federico da Montefeltro besieged it and Roberto was forced to abandon it, in exchange of a small fiefdom nearby for himself. Once back to Rimini, in 1466, Sigismondo Pandolfo named his other son Sallustio Malatesta as heir of Rimini.