Coventry City boss Mark Robins has no doubts Tottenham's England fullback Kieran Tripper has benefited from the English loan system.
Trippier played his way into England's World Cup squad this past season.
"The academies do a really good job but there is a clear difference (in the lower leagues) in terms of needing to win matches, having the pressure to deliver performances on a regular basis and hitting that level more consistently," Robins, who was in charge of Barnsley when Trippier was signed on loan from Manchester City, told the Independent.
"Young players need to get used to that, both mentally and physically, because the physical demands are different. For anybody, playing at a different level and experiencing these different things can be a benefit. It really can help, and you can see that in a lot of players. You can see the technical quality they have got, and that they have a lot of different experiences behind them."