Marco Andretti will not race in next month’s Miami Formula E event, the driver revealed via Twitter today.

We understand that, while it had looked likely in January that Andretti would race at both US fixtures (Miami and Long Beach) for the team set up by his father, there had been a question over IndyCar 2015 test dates. A subsequent Tweet hints that schedule clashes with IndyCar means that he will not now participate in either round.

We’re still waiting to hear whether Jean-Eric Vergne will race for the team in Miami. The Frenchman had expressed interest in competing in further Formula E outings after strong performances in Punta del Este and Buenos Aires. We’ll bring you comment from the team when we have it.

“Had to bow out of the Miami @FIAFormulaE race due to a schedule conflict,” Andretti posted on Twitter. “Bummer.”

In response to a Tweet mentioning his expected presence at the Long Beach race, he said: “Maybe. Need to focus on @IndyCar.”

twitter.com/MarcoAndretti