“Kimi’s move is a terrible loss for Lotus,” Salo told the MTV3 broadcaster.
“His market value is much higher than Grosjean’s, so they (Lotus) will probably have some explaining to do to the sponsors.”
On the other hand, there have been rumours Raikkonen’s Lotus exit could also spell trouble for Ferrari.
Salo, however, said he spoke with a high-ranking Ferrari official in Singapore and asked him about those rumours.
“I asked quite directly if Alonso is going to leave, and he said he is not,” said the 46-year-old, who in 1999 filled in at Ferrari for an injured Michael Schumacher.