The knock picked up by Junior Firpo during the Whites’ pre-season friendly against Blackpool cast further light on an existing issue in the Leeds squad.
Whites boss Jesse Marsch, who says the club were already onto the task of strengthening at left back, was left to try a few options in Firpo’s position as the players left for Australia without him.
Young defender Leif Davis was given something like a trial down under, but upon his return the 22-year-old was sold to League One side Ipswich Town.
Speaking after United’s pre-season friendly against Cagliari, Marsch said the club are confident of meeting their aims of adding a left back and striker.
"We want to make some more additions, and we have some targets, and we wanted this last week to really evaluate things and then to be prudent on our future decisions," he said.
"Hopefully this week we'll make some final decisions and make some final moves."
Here are 13 left-backs who are currently free agents available to Leeds United:
7. Elmir Nabiullin
The 27-year-old, who has one international cap for Russia, has never competed outside his home nation. | Getty Images
8. Erik Pieters
The 33-year-old Dutch international is currently recovering from a knee injury. | Getty Images
9. Toño García
With over 100 La Liga appearances to his name, the 32-year-old former Levante defender is rated at £720k. | Getty Images
10. Marvin Zeegelaar
The former Udinese defender, who made two appearances for Blackpool in 2013, was released by the Serie A side in July. | Getty Images
11. Miguel Trauco
The former Saint-Étienne has 68 international caps for Peru. | Getty Images
12. Alonso Escoboza
The 29-year-old Mexican has a market value of £1.35m and has never played outside of South America. | Getty Images