For Mardy Fish, there are not yet easy explanations for his uneasy, prolonged absence from the men’s tennis tour with physical and mental health problems.

Fish spoke in largely veiled terms Tuesday about his problems, which included a heart irregularity.

“As far as the heart condition is concerned, I haven’t had any issues with this,” he said. “It has been a scary thing. So that’s behind me. And, you know, you’re just trying to get in the best possible mental state. You can’t play this game without being fit, and without being mentally fit and ready.”

Of his troubles over all, he said: “A lot of them are mental, a lot of them are physical. Some of them are other sorts of things that are out of our control. I know that it doesn’t help that I’m sort of dancing around the question, but it’s been very hard.”