Eunan O'Kane hasn't played for Leeds United in close to a year.
The Whites are currently in the race for promotion from the Championship into the Premier League.
Leeds midfielder was injured at Luton Town.
Bielsa's Leeds have a number of players on the treatment table, but one on loan has suffered a horrific injury.
The Leeds United-owned midfielder is currently on loan with Luton Town.
Leeds United fans react to Eunan O'Kane's setback on Twitter.
Leeds United loanee Eunan O'Kane has suffered a season ending injury.
Leeds United-owned Eunan O'Kane has suffered a major injury.
Eunan O'Kane left the Championship and Leeds United for a spell in League One with Luton Town on transfer deadline day.
Eunan O'Kane has left Leeds United on a season-long loan.
Dario Del Fabro has had a real up and down career.
Tottenham Hotspur Jan Vertonghen is yet to make an appearance for Mauricio Pochettino's side this season.
Everton have begun their season by claiming four points from their first three Premier League matches.
RB Salzburg will face Liverpool in the Champions League.
Jack Grealish helped Aston Villa to their first Premier League win of the season last Friday.
Alex Iwobi left Arsenal for Everton on deadline day, in one of the surprise transfers of the summer.
Glasgow Rangers youngster Ross McCrorie continues to impress during his time away from Ibrox.
Who will Celtic sign before the European transfer window slams shut on Monday?
The Black Cats summer signing impressed for the Stadium of Light side as Jack Ross' charges took a Premier League scalp en route to round three.
Boli Bolingoli-Mbombo’s performance for Celtic this evening did not impress Tam McManus, who believes that he will struggle against Steven Gerrard’s Glasgow Rangers at Ibrox this weekend.