Sania, who recently became world number one, is a winner of three mixed doubles Grand Slam titles.

"I love playing tennis. I love practicing and working hard. I love competing. Until I keep enjoying, I keep playing. I want to achieve. Obviously, there is never enough. If Roger Federer can still play today, everybody should play. I want to win some Slams before I retire. We have some big tournaments coming," Sania told reporters.

"I am going to Stuttgart on Sunday night," she said on the sidelines of the Fed Cup, where she is leading India as playing captain.

Replying to a query, she said she would continue to partner with Martina Hingis with whom she had a successful partnership.

She said her decision to get married in 2010 and shifting to doubles are the two most important decisions in her career.

"In 2010, I thought my career was over. My wrist was bad and I was not even able to comb my hair. At that time, my tennis was out of question. So, one of my decisions was to get married. It took lot of things off me. I was happy in my life.

Six months later, me and my husband were having a conversation and he said, 'why don't you try to play again'. I went to Wimbledon and I won couple of rounds there. My wrist was better. That was, probably, one of the best decisions I made.

"Secondly, when I moved to doubles. It was a tough decision for me at that point. Because I had surgeries. So, I was not playing tennis at all or choosing one format. I think I would not have been able to get to the number one in the world if I was still playing singles," she said.

She complemented India's girl players like Ankita Raina who comprehensively defeated their rivals in the ongoing Fed Cup here. She said she is honoured to be the captain of the side in the Fed Cup.

She said she would play in Fed Cup when it is needed and "there was no need now".

Noting that it is a huge coincidence that she and star shuttler Saina Nehwal have achieved the number one ranks in two different sports, she wished Saina best for her future.

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