On Wednesday Mariano Diaz rejoined Real Madrid, making the move just before Friday's close of the summer transfer window in Spain, leaving Sevilla furious.
Having risen through the Blancos youth ranks but failing to secure a starting berth in the senior squad, the forward joined Lyon last July and enjoyed a stellar campaign in Ligue 1, netting 18 times in 34 outings.
Mariano's fine form has earned him a rapid return to La Liga. Below, though, Goal explains why Sevilla are so upset that the 25-year-old is bound for the Santiago Bernabeu rather than the Ramon Sanchez Pizjuan.