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Libor Kozak has said farewell to Aston Villa fans - with a message of regret.

Kozak's contract expires next month and the Czech Republic striker has been allowed to leave Villa now.

It ends a disappointing four year spell at Villa for Kozak who was signed for a reported £7 million by Paul Lambert from Lazio in August 2013.

Kozak scored four goals in 12 starts and 10 substitute appearances for Villa, but his claret and blue career has been hit by injuries and a lack of opportunities.

The 27-year-old frontman took to Instagram to pass on his message of gratitude to the Villa Park faithful.

"I would like to say thank you to all the Aston Villa football fans: thank you so much for supporting me and bearing with me for four years," said Kozak.

"I am deeply sad that I have not been able to repay your trust and faith.

"I have tried with all my strength but the last few years have been rather difficult for me!

"For this reason I am happy to close a chapter and start a new one, yet this memory will stay forever with me.

"I love you all, Aston Villa supporters, and I really wish you best of luck for the future!"