Dean Smith has warned clubs Jack Grealish will cost a fortune but the Aston Villa boss insisted he has never thought about losing his captain.

Villa face Derby in the Sky Bet Championship play-off final at Wembley on Monday.

Grealish would be expected to leave if Villa lose the £170million showdown despite signing a new five-year contract last September.

Tottenham were interested last year after Villa's play-off final defeat to Fulham but failed to agree a fee and Smith is not contemplating selling his star.

He said: "If we don't go up he'll cost someone a hell of a lot of money if they want to buy him. For me he is committed to Aston Villa and we've not even spoken about it otherwise.

Villa face Derby in the Sky Bet Championship play-off final at Wembley on Monday. Credit: PA

"He's signed a brand new contract at the start of the season, committing himself to the football club.

"He loves Aston Villa and he'll want nothing more than to get promoted with Aston Villa."

Grealish has been Villa's inspiration in their late run to the play-offs, scoring four times in their club-record run of 10 straight wins.

He scored a stunning volley when Villa beat Derby 4-0 at the start of March, his first game for three months after returning from a shin injury, which kickstarted Villa's winning run.