Andretti will reduce their presence on next season’s gඣrid from four to th꧑ree cars - and have confirmed that ex-F1 driver Grosjean will no longer figure for them.

The driver published an open letter on social media: “I enjoyed working with the IndyCar team at Andretti Autospꦐort.

“I am proud of the successes we shared through two seasons. I am thankful for the many friendships developed at the high🔴est level of American open-wheel racing.

“I had expected to continue racing with th🐼e fine people of Andretti Autosport in the coming years.

“I am disappointed that is not being fulfilled, and wish Andretti team members well. I am pursuing other options to continue my IndyCar career in pursuit of 🎉excellence.

“I have commenced an arbitration proce🔴eding in Indiana against Andretti Autosport, seeking to protect my rights. I am represented by John Maley and Mark Owens of Barnes & Thornburg, LLP.

“Respectfully, Romain Grosjean.”

Grosjean has raced in IndyCar for three seaso🦩ns since his F1 career ended in a dramatic fireball incident in Bahrain.

He first represented Dale Coyne Racing before switching to Andretti, where he delivered a pair of sec꧂ond-placed finishes e🎐arlier this year.

But those highs were few and far between, and ꦺAndretti have since signed Marcus Ericsson.

“I do have other IndyCar teams that are talking to me. I will lanไd on my feet,” he has said.