Middlesbrough boss Aitor Karanka has admitted that his side will face an extremely tough task in their Championship clash against Leeds United.
The North-East outfit have won their last five matches on the spin in all competitions, including their 3-0 triumph over Wolverhampton Wanderers in the Capital One Cup in midweek.
Karanka has failed to beat Leeds in his time with Boro and believes that they will continue to be a tough team for him to crack, especially with Uwe Rosler in charge.
He told Sports Mole: "They've been working with Uwe throughout pre-season and I felt for that reason that they are going to be a difficult team.
"He's very organised and has been working with them for three months, so it's going to be a very tough game for us."
The Spaniard added in his pre-match press conference: "Leeds are a team who are always difficult to play. I have never beat them. I'm working in the way that I always work."
Middlesbrough take on Leeds at the Riverside Stadium on Sunday.
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