Sania Mirza hit top gear after deciding to pair with Martina Hingis in the women's doubles circuit. The Indo-Swiss pair has been dominant in the circuit, winning the 2015 Wimbledon, the US Open and WTA titles as well.

Though Sania had been in the doubles circuit for many years pairing with Elena Vesnina and Cara Black, among others, in the past, it was only with Hingis that she won her first grand slam title. Saina's previous best was a runners-up finish in the 2011 French Open final partnering Vesnina.

But the Khel Ratna does not want to compare her partners.

"With Vesnina we have come close to winning Slams on couple of occasions, with Cara (Black) I won the WTA Tour Championship, which was huge. No one has ever won it earlier from our country. It's the toughest Tour to play on as you compete against the best in the world. In a Slam you at least get a few easy matches at the start of the tournament. So, it's unfair for me to say that one is better than the other," Sania told reporters.

Sania and Hingis, who can finish the season on a high, have some more tournaments before the year comes to an end.

The Indo-Siwss pair, who are ranked No. 1, loves the pressure and steps up performance when it comes to major tournaments, as was witnessed during the 2015 Wimbedon finals. Sania and Hingis were 2-5 down in the third set but played some stunning tennis to make a huge comeback to win the title. 

"But me and Martina are really doing well. We both love the pressure and embrace it. When we get into big moments we kind of step up our game," said Sania.

"It's the chemistry off the court that pulls you through those tough moments in the match. For us it was huge to win that match from 2-5 down in the third set at Wimbledon. You need to have good amount of trust in your partner as there might be days when you are not playing great or your partner is not playing great."

The world No. 1 player in doubles is not happy with the WTA tour scheduling, which takes a huge toll on players, since they have to play for around 25 weeks in a year.

"Mentally its tough because we are competing 25 weeks a year and as tennis players we are meant to peak every week that we play. I have already played something around 60 matches till now. In other sports you have to peak in couple of months or even an year, but that doesn't happen with tennis," said Sania.