Roger Federer says he is making good progress as he recovers from his back injury ahead of the US Open.

The Swiss ace had to pull out of the Cincinnati Masters recently due to the injury but he's confirmed he's back out on the court practicing again as he aims to be back to full fitness for Flushing Meadows, with the US Open getting underway on Monday.

Speaking at a press conference to promote the Laver Cup event in New York between September 22-24, Federer admitted he's struggled with the back problem but he hopes the fact he took a large chunk of the year off to prepare for Wimbledon will serve him well in New York.

He said: "Other than the back issue, you know, I'm coming in as good as I can possibly feel, because I have played extremely well and I have not overplayed. Funny enough, that combination, I don't think I have ever had it to the extent I had it this year.

"I didn't play all the clay court season. I took 10 weeks off in hope that it would pay off for the grass court season, and it did. Again, that was good, saving the body and the mind and remaining fresh for hopefully the rest of the season."

He added: "I just make sure I'm 100% ready when the matches come around here in New York. I'm feeling really excited to be here. I'm back on the practice courts. Feeling much, much better than a week ago. That's very encouraging for me ahead of New York."