Latifi and Russell extended their contracts for next season in July prior to the Williams sale in August, but their futures appear to be in limbo amid suggestions new owners Dorilton Capital are seeking extra funding that could come with the likes of Perez.
Perez, who has significant financial backing from a number of sponsors, notably Telmex, was recently axed by Racing Point despite having a contract as the team - that becomes Aston Martin next season - signed Sebastian Vettel.
Of the two drivers, Russell appears to be the most vulnerable despite his Mercedes backing as Latifi brings with him considerable sponsorship from Canada.
When asked to confirm whether Russell and Latifi would be with the team next year, Roberts said: "We don’t want to say anything one way or the other. Nothing’s changed.
"There’s lots of speculation, there are lots of good drivers around that are now looking for seats. Dorilton bought the team and nothing changed, so we can’t say any more than that."
Roberts, who repeated Dorilton Capital has not influenced Williams' preferred line-up for 2021 since taking over, praised his current driving duo but continued his refusal to confirm either for next year.
"They’re both doing a great job but there’s so much speculation around, I don’t want to inadvertently fuel it," added Roberts. "Someone will take some nuance to whatever I say. We’re happy, let’s watch the rest of the market.
"I'm just not going to talk about it. Dorilton bought the team, nothing changed with regards to the drivers.
"There's just so much speculation and rumour, it's crazy. It's silly season after all. We're not saying any more than that."
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