Rodrigo underwent a scan on Monday with club officials waiting to hear the verdict.
The 29-year-oid suffered the problem in the first twenty minutes of the game at the King Power Stadium.
After initially going down and receiving brief treatment, he attempted to play on, only to be forced off two minutes later and replaced by Mateusz Klich.
Two other key attacking players in Patrick Bamford and Raphinha picked up knocks in the 3-1 win, potentially threatening their participation in Wednesday's home game with Everton at Elland Road.
But head coach Marcelo Bielsa confirmed that the situation with the pair is 'less worrying.'
Bielsa said: "Rodrigo is having a scan to evaluate his condition. He had an action where both feet were very wide apart. Potentially, the excessive stretching caused a muscle injury. The other two cases are less worrying.
Two days prior to the game you cannot be sure any player will be available for the game. The only thing to add is that the problem that Rodrigo has overcome to be available for Wednesday is bigger.
"The problems that Raphina and Bamford have are more simple."