Sebastian Vettel gave Ferrari its first win in nearly two years at Sepang, and he beat the Mercedes on pure pace. But can the Scuderia keep it up in future? Kate Walker investigates... The Malaysian Grand Prix was Ferrari's first win since the 2013 Spanish Grand Prix, and confirmed the wisdom of Sebastian Vettel's decision to leave the once dominant Red Bull for the red-suited Italians. Not only did Vettel secure the victory of Fernando Alonso's dreams, but he managed to lap both of his former employer's cars in the process – a moment of sweet schadenfreude. But on the quadruple-champion's slow-down lap the world TV feed broadcast a victory song, a triumphant "Ferrari's back!" To those watching Sunday's race at Sepang International Circuit, the assured victory did not point to a more open championship, but rather to potential problems further down the line for the Italian racers. Vettel's win hinged on three factors... First, the...