Hernandez has missed United's last two games with a groin injury but the 35-year-old Spaniard is reported as fine by Whites head coach Marcelo Bielsa ahead of his side's return to action at Elland Road.
Centre-backs Cooper and Llorente, meanwhile, both picked up groin injuries on international duty with Scotland and Spain respectively but Cooper's problem is not as bad as Llrorente's with the Spanish defender facing up to three weeks out.
It was thought that Cooper could return within a fortnight and the captain has not been ruled out of Monday's clash but Bielsa admitted there was a "risk" of the skipper missing out.
Asked about his team news, Bielsa said: "Pablo is fine. Klich I have no news of him having any difficulties, Llorente has a muscular problem, Cooper also has a muscular problem but it’s not as bad which puts him at risk of missing the game against Wolves on Monday.
"All the other internationals returned without any problems."
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Thank you Laura Collins