"Driving an FP1 for the first time is a huge milestone for every driver, yet for me,
it is also a national achievement to be carrying the Israeli flag.
"I have thoroughly been preparing for it with the team and I believe we can
get great value out of it."
As the official test and reserve driver for Williams, Nissany is set to make three FP1 appearances in 2020.
Over the last two weeks at Silverstone, Russell revealed Williams is actively pursuing high-downforce set-ups to increase race pace at the cost of one-lap pace in qualifying.
At the Circuit de Catalunya, a circuit known for its balance of high- and low-speed corners, Nissany will have to continue fine-tuning the FW43 in his 90 minutes on Friday.
Williams Head of Vehicle Performance Dave Robson added: "We spent time with Roy in Abu Dhabi at the end of last year and we know that he will immediately be up to speed and contributing to the important test plan on Friday.
"We continue to push the FW43 hard and this return to Barcelona is an opportunity to explore again the higher downforce set-ups at a circuit that we know well."
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