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.
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.
Let's hope you're one of the first out of the door.— Paul Spencer (@pspencer2962) June 15, 2018
Better get your fitness up and take on plenty of fluids looking at his training methods— M. (@UnitedL33ds) June 16, 2018
I wouldn’t worry I don’t think you’ll feature I’m sorry to say— James Freeman (@jamesmfreems) June 15, 2018
Good lad but you are no captain so let’s hope that’s first thing he changes.— Dale sargeant (@dalesargeant01) June 15, 2018
Hello goodbye— Mip (@mipsical) June 15, 2018
Need a much better season from you liam. That goes to all the players aswell— LUFC FANS HERE (@lufc_fans_here) June 15, 2018
Bielsa’s going to turn Cooper into the Scottish Ramos— Ashley Weatherill (@AshWeatherill1) June 15, 2018
Be prepared to work— Gary LUFC (@Gary_Calter) June 15, 2018
Double training sessions a wait coops.— Benjamin Thornton (@BenjaminTlufc) June 15, 2018
Back to it in league 1— Josh Ledgard (@josh_ledgard) June 15, 2018
You sure about that Liam? His training methods looks horrific— Tony (@Tonylufc28) June 15, 2018
Have something to tell us about this article?