I worked hard to be fit to wear this outfit, says Serena Williams

wore a very nice green outfit at the Australian Open. The American player explained the reasons that led her to wear this kit. Serena lost a lot of weight in the last months. We design really far in advance at Nike, the 23-time Major winner said.

I knew that I have been working really, really hard in the off-season to be incredibly fit and incredibly ready. I took a year off and just get back with still trying to getting 12 months under my belt of playing, actually.

Yeah, I wanted to be fit. I came back. Nike always wants to make an incredibly strong, powerful statement for moms that are trying to get back and get fit. That was basically it for me. I just literally couldnt try to do all the travelling.

I was always doing something. I was either in school or working on some company. It was always something I was doing, so it didnt actually allow me to travel as much. I always feel when I play tournaments, I just try to do the best I can in them, and then maybe I would not have to play as many.

ALSO READ: Rafael Nadal: Worse players than David Ferrer won a Grand Slam title