Ghana international Bernard has been ruled out of Fortuna Dusseldorf's German Bundesliga return fixture against Paderborn on Saturday.
The attacker is sidelined by injury as the top-flight makes a comeback for the first time in two months due to the coronavirus disruptions.
On loan from Schalke 04, he has so far made nine league appearances this term. The 22-year-old is one of four Ghanaians at Dusseldorf, the others being centre-back Kasim Nuhu Adams, winger Nana Opoku Ampomah and youngster Kelvin Ofori.
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"For Dawid Kownacki, Bernard Tekpetey and Zack Steffen the game comes too early after their injuries," Dusseldorf boss Uwe Rosler told pressmen in his team news at the pre-match conference on Thursday.