Former Chelsea technical director Michael Emenalo said defender Andreas Christensen is an example that the Premier League champions' loan programme works.
Christensen, who replaced David Luiz in Chelsea's 1-0 win over Manchester United on Sunday, spent two years on loan with Bundesliga side Borussia Monchengladbach and he's now competing for a place in Antonio Conte's first team.
However, when asked about the Chelsea's loan system and whether the Danish centre-back is a good example of it's result, Emenalo - who stepped down from his position on Monday - told Chelsea TV: "Absolutely.
"Andreas, unbeknown to him, gave me a wonderful parting gift yesterday because his performance is indicative of what development is all about.
"Development equals humility, hard work and timing and Andreas has done all three.
"He's shown great humility to go on loan and work very hard while he was there and gain the experience which is needed.
"The timing is right for him now to step in and show what he's learnt during those periods of development."