Damon Hill has warned Rubens Barrichello that he may struggle to adjust to life away from F1 as "nothing" comes close to matching it.
Although there has been no official confirmation, it appears that Barrichello's F1 career, which spanned 19 years, reached its conclusion on Tuesday when Williams announced Bruno Senna as their second driver for 2012.
Rumours have linked the 39-year-old Brazilian to a move to IndyCars, although O Estado de Sao Paulo reports that he has ruled that out after promising his wife that he won't race on ovals.
But wherever he may go next, Hill has warned him that it won't be the same as racing in Formula One.
"There are a limited number of characters in F1 and Rubens has been thoroughly a positive character," the 1996 World Champ told The Sun.
"It's a really difficult thing for drivers to give up.
"The shame is there is nowhere to go next for a driver. Nothing is the same as Formula One."