Grosjean will contest only the road course events on the IndyCar calendar this year. This means the Frenchman will not race at the Indianapolis 500 in May.
When announcing his decision to race in the United States, Grosjean provided an update on the injuries sustained in his horrific crash at the Bahrain Grand Prix.
"The left hand is the one that is the most damaged," he said. "The right is good. Left, the skin is here, there isn’t anywhere… it is 98 per cent fully recovered on the surface.
"It is still a very pink, new-type skin and I have got a lot of exercises in the day and mobility to get it working. I had the left thumb ligament that was also pulled away so I had to get surgery on it but it is quite stable.
"So I am also focusing on rehab and getting it to work and the mobility on it. Until you reach six months, it is difficult to know if you are going to lose mobility or not. Some days are going good, some days are more complicated, more painful and difficult."
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