Former F1 world champion Jacques Villeneuve believes Ferrari should offer Kimi Raikkonen a new contract for 2019 instead of promoting Sauber driver Charles Leclerc alongside Sebastian Vettel.
Ferrari has yet to confirm its driver line-up for 2019, although reports earlier this year claimed a deal was done for Leclerc to replace Raikkonen.
Vettel has a contract at the team until the end of 2020 and Villeneuve is concerned a young driver like Leclerc would struggle against the four-time champion.
"Look at the work [Kimi's] been doing," he told F1's official podcast Beyond the Grid. "He's third in the championship, he's often quicker than Vettel and when he's not he's just a tenth behind.