Robert Kubica would be open to moving on to other motorsport pastures if an F1 seat for next season fails to materialize.
The Polish driver was assigned a reserve and testing role with Williams at the beginning of the year, after his sensational F1 comeback ambitions did not come to fruition following the Grove-based outfit's decision to field Sergey Sirotkin alongside Lance Stroll this season.
While Kubica hasn't abandoned his ambitions to secure a full-time seat in F1, he also won't hold on to that dream forever.
"I spent a lot of time and effort to have a chance and the priority would be to be on the starting grid in Australia,” Kubica said via Autosport.
"But if this doesn’t happen I would consider some different championship or different role. As I said, now I’m focused on trying to get a chance."
The 33-year-old admitted that his current lack of on-track activity isn't helping his cause, as questions marks still remain as to his true capability behind the wheel of a Grand Prix car.
"When you don’t do it for a long time or you do it like I do it, every three months, it’s normal that you have to go through different phases in order to get back your rhythm, get back feelings as natural as possible," he added.
"If you would take even the best tennis player and you say to him: now you stop for six years. Even without injuries, nothing.
"Then you give him one hour of training and smash him into the final of Wimbledon, he will probably struggle more than all the people who are playing regularly.
"I would have so much time in the car [if he had raced this season], there would be no more question marks about myself."
Prospects for next season in the event that F1 escapes him once again could include a stint in the World Endurance Championship, a series he could have competed in this year, having declined an opportunity to race for Manor.
"It is completely different racing, a completely different category," he added. "It might be a good challenge.
"I saw it with rallying, okay, rallying is completely different than racing, and endurance races have more similarity to let’s say F1, but still it is a different category.
"I think new challenges are nice. There is always some extra that gives you boost to go there and to see how you perform."