Thomas Christiansen critical of Leeds defender Gaetano Berardi

Leeds manager Thomas Christiansen looks on during the Sky Bet Championship match between Cardiff City and Leeds United at Cardiff City Stadium on September 26, 2017 in Cardiff, Wales.

Leeds United lost against Cardiff City in the Championship on Saturday.

Leeds United manager Thomas Christiansen leaves the field during the Sky Bet Championship match between Ipswich Town and Leeds United at Portman Road on January 13, 2018 in Ipswich,...

Leeds United’s poor run of form continued on Saturday afternoon, as they suffered a heavy 4-1 defeat to Cardiff City at Elland Road in the Championship.

Cardiff were the better team from start to finish and deservedly picked up all three points from the encounter.

The West Yorkshire outfit’s task of winning against Neil Warnock’s side was made harder in first-half injury time due to the sending-off of Gaetano Berardi.

The 29-year-old, who can operate as a right-back or as a left-back, was dismissed for two bookable offences.

Leeds head coach Thomas Christiansen was not impressed with the Swiss defender, who has been on the books of the Championship club since 2014.

Fraizer Campbell of Hull City is held off by Gaetano Berardi of Leeds United during the Sky Bet Championship match between Hull City and Leeds United at the KCOM Stadium on January 30,...

Christiansen told Leeds Live about Berardi's red card: “Well, it’s a problem that we are having lately.

“It’s difficult to deal with, when we speak about the emotions, the passion that Berard puts into the game. We know that all the tackles he goes 100% but we need to be intelligent.

"It's a situation where he already has one yellow card and when you go to the ground it's because you are 100% sure to take the ball. If not, you continue staying and when you have the possibility to steal the ball you go in."

Gaetano Berardi of Leeds United tackles Connor Roberts of Middlesbrough during the Sky Bet Championship match between Leeds United and Middlesbrough at Elland Road on November 19, 2017 in...

The defeat to Cardiff means that Leeds are now 10th in the Championship table with 44 points from 30 matches.

The Whites are seven points behind sixth-placed Bristol City, and the signs are not looking great. Leeds need to put together a run of positive results soon.

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