Now in his third season with Brighton, the 24-year-old central midfielder is showing his quality in the Premier League.
Bielsa briefly managed Bissouma when they were at Lille in 2017, and admires the player.
Speaking during a pre-match press conference ahead of Leeds' Premier League game against Brighton on Saturday, Bielsa said: "He was a great player and he has confirmed it.
"It's not the same to have potential and to show it.
"When I had the opportunity to work with him he was a player who had a lot of resources and here he has shown them completely.
"Not because I say it, but he has managed to gain recognition from the Premier League due to the resources that he has."