Aston Villa boss Unai Emery says they'll be wary facing Sheffield United tonight.

Emery recognises Chris Wilder has lifted the Blades since his return.

He said, "We are excited and we are very motivated of how we can face Sheffield, but my concern for tomorrow is that it will be very difficult to win, to win, to win and win again.

"When we were winning against the best teams in the league like Arsenal and Man City, Sheffield is for me and the same players is the same difficulty for how we faced against Man City and Arsenal.

"We will respect them a lot and we are going to try and play being very demanding because they have a new coach and their situation being at the bottom, they are going to play very motivated. They know we are very difficult to beat at Villa Park, we are feeling very strong, and for them it is a big challenge.

"If you are not playing with the same idea we are playing with at Villa Park, or if we are thinking that it will be easier than the matches we played, then we are closer to losing our first match at home for a long time. This is the reason their motivation is a big motivation.

"We are preparing being very demanding to improve because even winning the matches against City and Arsenal, we are analysing how we can improve. That is our idea for tomorrow and of course at Villa Park we want to be with our supporters in the same energy we have at home."