1. Diego Costa
Fans of La Liga knew Diego Costa simply as Falcao's understudy at Atletico Madrid.
Although showing a clinical touch in front of goal, scoring 10 goals in 31 appearances, he didn't have what it took to outshine his Colombian team mate.
But Falcao was sold and Atletico opted against signing a replacement, putting all their faith in Costa.
That gamble has now paid off in sensational fashion. Costa has so far scored 21 goals in La Liga, keeping pace with Cristiano Ronaldo and outscoring Lionel Messi.
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