Liam Cooper and Stuart Dallas recently signed new contracts with Leeds United.

Bielsa has also suggested that Stuart Dallas can be successful in the top flight of English football as well.
Central defender Cooper and Dallas – who can operate as a winger or as a full-back – recently signed new contracts with the West Yorkshire outfit.
Bielsa told The Yorkshire Evening Post when asked if Cooper and Dallas can play in the Premier League: “Last match, Dallas played Germany. If you watch this match you will find an answer to your question.
“Cooper played against Belgium’s strikers. Russia as well. He left a clear message he can play against top-level players.”
Improvement
Cooper has been on the books of Leeds since the summer of 2014 when he joined from Chesterfield for a transfer fee reported by The Yorkshire Evening Post to be worth £600,000.
There were concerns about the defender initially, but in recent years, the 28-year-old has taken his game to another level.
The central defender has improved a lot under head coach Bielsa, and he is now a leader at the back for Leeds.
According to WhoScored, Cooper has made five appearances in the Championship for Leeds so far this season, and played 38 games in the league for the Whites in 2018-19.

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