Some Leeds fans are concerned about Liam Cooper under Marcelo Bielsa

Tom Bradshaw of Barnsley and Liam Cooper of Leeds United in action during the Sky Bet Championship match between Barnsley and Leeds United at Oakwell Stadium on November 25, 2017 in...

Leeds United have appointed Marcelo Bielsa as their new head coach.

Liam Cooper of Leeds United applauds the traveling fans during the Sky Bet Championship match between Norwich City and Leeds United at Carrow Road on April 28, 2018 in Norwich, England.

Leeds United defender Liam Cooper is looking forward to working with new head coach Marcelo Bielsa and has expressed his excitement on social networking site Twitter.

However, some Leeds fans think that Cooper will struggle under the Argentine manager and will not be able to cope.

Bielsa is a very demanding coach and is one of the most innovative football managers in the world.

The Argentine wants his players to work hard, and give their all in training sessions as well as during matches.

Liam Cooper of Leeds United in action with Andreas Weimann of Derby County during the Sky Bet Championship match between Derby County and Leeds United at iPro Stadium on February 21, 2018...

Cooper is a key figure at Leeds - who have not featured in the Premier League since 2004 - and has been an important player at the heart of the defence for a while.

The former Scotland Under-19 international centre-back, though, has not always been great, and some Leeds fans are concerned whether he will be able to succeed under Bielsa.

Cooper has been on the books of Leeds since the summer of 2004 when he joined from Chesterfield for a transfer fee reported by The Express to be worth £500,000.

Liam Cooper of Leeds (L) battles for the ball with Neal Murphy of Brentford during the Sky Bet Championship match between Brentford and Leeds United at Griffin Park on November 4, 2017 in...

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