The powerful Serena Williams may be the 'best player' but World No 2 Victoria Azarenka insists that she is steadily closing the gap.

The Belarusian player has said that she too is playing the best tennis like the World No 1 Serena Williams.

According to Sport24, Azarenka suffered another bruising loss to the mighty American in the US Open final earlier this month in a repeat of the 2012 championship match in New York.

Azarenka walked off court with her head held high after a gallant loss to Serena Williams in the US Open final on Sunday, and while satisfied she had given her all there was no doubt the defeat stung.

"I'm not going to lie. It hurts bad," she conceded after a 7-5, 6-7(6), 6-1 at Flushing Meadows.

"It's okay. I did everything I could. I gave my heart. I fought as hard as I could.

"I lost to a great champion and I'm still going to have my head up."

However, the Belarusian quickly climbed off the canvas, saying she was over it in 24 hours, according to the report.

The 24-year-old Azarenka said that it was hard to compare her game with Serena and that it was like comparing Muhammad Ali and Floyd Mayweather because they were both the greatest in two different eras.

Azarenka paid tribute to Williams after the American won the 17th major singles title of her career.

"Well, there's one word," Azarenka said of Williams.

"She's a champion, and she knows how to repeat that. She knows what it takes to get there. I know that feeling, too. And when two people meet who want that feeling so bad, it's a clash. That's what happens out there with those battles.

"And in the important moments, it is who is braver. Who is more consistent. Who takes more risk. You can never play safe."