The 17-year old has already made 14 appearances for Slovenian side Domzale and he spent a week in South Wales last month hoping to impress Michael Laudrup.
Zabret returned to Slovenia at the end of his trial but he says that the experience will encourage him to continue working hard.
He told Slovenian newspaper Ekipa: "I was there one week and firstly I trained with the first team. When Michael Laudrup began with preparations for the Chelsea clash I moved into the reserve team so I had quite busy days.
"For now I know what is my reality and the Slovenian league is a good start for young players like me. We are working quite good here.
"But what I saw motivates me even more and since I was a young lad I dreamed about playing in England. Maybe my dreams will one day become true if I will work hard enough."
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