Aberdeen have completed the signing of defender Tommie Hoban on a season-long loan from English Premier League side Watford.

The 24-year old was a member of Watford's promotion-winning side three years ago but has been unable to secure a first team place with the Hornets and suffering a serious knee injury last year.

He spent the 2016-17 season on loan at Blackburn and has now moved to Pittodrie join Derek McInnes' squad.

Hoban will go straight into the squad for the Europa League second qualifying round match against Burnley on Thursday night.

"Tommie is a player we had last week and thankfully we managed to get the deal resurrected," McInnes told RedTV.

"First and foremost he's an excellent defender and it's well known that we've been in the market for another defender and to get a player of his quality from Watford is a great piece of business.

"Although he can play anywhere in the defence, centre back is his preferred position."

The club also announced that they have signed goalkeeper Thomas Cerny on a one-year deal.

Lewis Ferguson, Stephen Gleeson, Chris Forrester and Dominic Ball have already moved to Pittodrie this season.