On April 25, the Genoese fleet set sail from Genoa, but first headed to Portofino where they were anchored there for one or two days. When the crews learned of an attack by Oberto Pallavicino on the town of Zolasco, they intended to come to the rescue, but the two legates prevented it by successfully pushing for a quick drive to Rome. In another stopover in Porto Venere they learned of the union between the Sicilian fleet and that of the Pisan fleet and thus now had an enemy between them and their destination. They managed to sail past Pisa, but not unnoticed since the Imperial fleet was already emerging between the islands of Montecristo and Giglio. Of the battle Matthew Paris recorded: