Napoli boss Rafa Benitez admits he was angered by president Aurelio de Laurentiis' training 'retreat' demands.

Benitez was speaking after reaching the Europa League semifinals.

He said: "We already proved last year that we can win without a training retreat. This is something people used in 1970.

"I am not against a training retreat per se, but I am against a punitive training retreat that has no effect other than to annoy the players."