Five interesting facts ahead of Serena Williams' historic Australian Open final appearance

New Delhi: Serena Williams takes on Angelique Kerber in the women's singles final of the Australian Open on Saturday.

The world number one was in a different class in 2015 as she swept to the Australian Open, French Open and Wimbledon titles, losing just three matches out of 56 all season.

Despite being virtually untouchable, the 34-year-old believes her game is now on another level, with a near flawless first set against Agnieszka Radwanska in the semi-finals ample evidence.

The defending champion has put the disappointment from last season's US Open behind her to hit peak form at the year's first major.

While the Serena is overwhelming favorite to come through against Kerber, fans would want a match to go the distance.

Here are five interesting facts ahead of Serena's historic appearance at the Rod Laver Arena.

1) Serena has lost to Kerber just once, but won all their last five meeting without dropping a set.

2) Every time the American has made a semi-final at the Australian Open, she's lifted the trophy.

3) The world number one has captured the year's first Grand Slam on six (2003, 2005, 2007, 2009, 2010, 2015) occasions.

4) This is the first time the 34-year-old reached the final at of the Australian Open without dropping a set.

5) With a win in the final, Serena will equal Steffi Graf's record of 22 Grand Slam titles.

(With Agency inputs)