Martinez responded: "To criticise us is ridiculous...it would be the same as criticising us for developing a lot of young players, and giving them a chance, which is what we have done this season.
"The loan system is something that has to be part of the game - we have seven players ourselves out on loan and you need to develop young players.
"It's just a question of finding a loan system that works. It has got its pros and cons - but from our point of view it works.
"And remember, no loan player would be a success unless you had a strong core group of players, which is what we have here. People forget that."
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