Simone Biles, struggling with ‘the twisties,’ says she can’t ‘tell up from down.’

Simone Biles, center, watched the women’s all-around from the stands on Thursday.Credit...Doug Mills/The New York TimesTOKYO — With only two days left until the gymnastics apparatus finals begin at the Tokyo Games, Simone Biles still hasn’t announced whether she will compete in them. But she said on Instagram on Friday that she was still struggling with a mental block that gymnasts call “the twisties” that in part prompted her to withdraw from the team final and the all-around.

“Literally can not tell up from down,” she wrote in an Instagram story. “It’s the craziest feeling ever. Not having an inch of control over your body.”

Biles, the four-time Olympic gold medalist, wrote that she…