Hunting hidden gems - is there anywhere in the world left to scout?

The world's biggest clubs were all aware of the teenage sensation turning heads for Universidad de Chile, the one dubbed his generation's Alexis Sanchez.

"When we signed Dario Osorio, it was not because no-one knew about him," Kristian Kjaer, technical director at Midtjylland, tells BBC Sport.

Osorio was on the radar of AC Milan, RB Leipzig, Salzburg and a number of other English and German clubs before he left Santiago for Denmark at the age of 19.