Aston Villa defender Ciaran Clark is upset for Libor Kozak over his broken leg injury.

Kozak was taken to hospital in an ambulance last Thursday after sustaining the severe injury to his right leg in an innocuous training-ground challenge with Clark.

"He's had his treatment and hopefully he'll come back stronger and all the lads are thinking of him," Clark told the Birmingham Mail.

"Hopefully he'll make a full recovery. We were playing a possession game and it was a clash of legs. No-one expected it and we thought he was going to get back up. The physio came on and knew it was a bad injury.

"I didn't sense anything was wrong and I don't think anyone did. At the time people thought it was a normal challenge.

''I don't know if it was the impact or the way his leg went but it was innocuous and no-one expected it to be as bad."