Jose Mourinho believes Joao Felix's huge price tag means he must produce the goods at Atletico Madrid despite his tender years.
The 19-year-old forward joined Diego Simeone's Atletico from Benfica in a €126 million (£117m/$141m) move last month and has turned in some dazzling pre-season displays.
In addition, he must step in to help fill a major void in attack following Antoine Griezmann's long-anticipated move to La Liga rivals Barcelona eventually coming to fruition.
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As such, his famed Portuguese compatriot Mourinho believes there will be a demand for instant results regardless of his youth.