Answer
Jackson Martínez joined Atlético Madrid for €35 million in 2015. The Colombian striker had been in impressive form for Porto in recent seasons, scoring 62 goals in 115 appearances. He was seen as a potential replacement for Diego Costa, who had left Atlético for Chelsea in the summer of 2014. Martínez made an immediate impact at his new club, scoring 14 goals in his first 24 appearances.