Everton boss Roberto Martinez is pleased with the way in which his inexperienced defence has coped in recent weeks.
Tyias Browning, Brendan Galloway and Ramiro Funes Mori all impressed in Sunday's 1-1 draw with Liverpool at Goodison Park despite having just 17 minutes of derby experience between them before the game.
"Tyias performed with defensive arrogance, Brendan brings a smile to your face and Funes Mori and Phil Jagielka looked like a partnership that had been performing for years," Martinez said.
"Phil Jagielka has been the most consistent and best English centre-back in the last 12 months. It is no coincidence anyone around him performs."
"We knew with injuries it would be a test for the lads and they tried their hardest," he told evertontv.
"It is all part of their learning curve and fantastic for them. It is also great for Ramiro getting this game time and learning the English game."