New Zealand driver Liam Lawson is set for another couple of drives in Formula One.
Lawson has replaced Daniel Ricciardo at AlphaTauri for the last two rounds after the Australian broke his hand in practice at the Dutch Grand Prix.
Red Bull boss Christian Horner has now confirmed that Ricciardo is unlikely to race in Singapore next week, and could also miss Japan.
Lawson jumped into Ricciardo's seat at the Red Bull-owned sister team at Zandvoort and in the Italian Grand Prix at Monza last weekend.
"Certainly Singapore, I don't think there's any chance he (Ricciardo) will be ready for then. It would be optimistic for Japan," Horner said.
"We've seen with motorcyclists rushing comebacks, they sometimes do more damage so I think we just want to make sure he's fully fit before he gets back in the car."
Horner said Lawson, who has been racing in Japan this year and would undoubtedly feel at home at Suzuka, had done a solid job.
"I think he's acquitted himself very well," he said.
21 year old Lawson finished 11th at Monza after 13th place in the Netherlands.
-Reuters