Serena Williams of the U.S. acknowledges the crowd after winning the women's singles match against Lucie Safarova of the Czech Republic at the China Open tennis tournament in Beijing October 2, 2014. REUTERS/Petar Kujundzic
Serena Williams of the U.S. acknowledges the crowd after winning the women's singles match against Lucie Safarova of the Czech Republic at the China Open tennis tournament in Beijing October 2, 2014. Reuters

Serena Williams has kickstarted her training for the 2015 tennis season by taking part in a charity marathon event for her foundation. In 2015, Serena wants to achievw more success in the tennis court with a specific goal of winning her 19th Grand Slam title.

In her feature interview with fellow 18-time Grand Slam champion Chris Evert for ESPNW's Impact 25 and ESPN The Magazine's Interview Issue, Serena talked about a number of things including her goals in the upcoming tennis season as well as retirement. She said that she is looking for an improved 2015 tennis eason.

According to Serena, she will try to equal former World number one Steffi Graf's record of 22 Grand Slam titles. However, she revealed that her main focus right now is the 103rd staging of the Australian Open, where she is a five-time champion.

"Right now, I'm really focussed on 19 (Grand Slam title), which will begin in Australia," Serena told Chris. "Whether I get there or not, I don't know, but I know if I get to 19, the second it happens, I will be thinking of 20."

At 33 years old, Serena has proven that she is still one of the fiercest competitors on the tennis court. She has proven that she is still a threat even to the younger generation of tennis athletes. On the topic of retirement, Serena admitted that she sometimes contemplate about hanging up her racket for good, which she thinks is just normal, but she also revealed that she is not ready to retire just yet. For the American athlete, the long-term picture is all about choosing the tournaments that she participates in.

Going into the 2015 tennis season, Serena has a few minor things to change as far as her game is concerned. She said that she needs to move a great deal quicker on the court, and simply be more "dynamic and awesome" when she's playing. Her main focus is bringing her 2013 serve back.

The reigning U.S. Open champion said that she is frustrated with the way that she was serving in the last season. Serena said she had a lot of double faults, which she thinks could be the aftermath of her perfectionism.

Serena said she is always dissatisfied with mediocrity and always looking to perfect in her craft, even if she is training. However, she has taken great strides toward improvement and has rolled out a few changes this late spring during the 2014 Cincinnati Open. Serena said her coach Patrick Mouratoglou has been a great help for her.

Meanwhile, Serena has recently been named as World Champion in women's tennis in the 2014 International Tennis Federation Awards, or ITF, according to Sydney Morning Herald. The men's World Champion award was given to Serbian athlete Novak Djokovic. American doubles players Bob and Mike Bryan received the men's double World Champions, while Italian Sara Errani and Roberta Vinci were declared the women's double World Champions. The awards will be presented to the winners at the 2015 ITF World Champions Dinner, which will take place during the Roland Garros tournament in Paris on June 2.