Kim Sears watched her boyfriend Andy Murray at the Ausralian Open on Jan. 20 dressed in a more casual look.

Andy Murray had a match against Marinko Matosevic during the third day of the Australian Open and girlfriend Kim Sears was there to show her support, said Daily Mail.

The 26-year-old was wearing a cropped white shirt with an image of a dog along with the words "I Shih Tzu Not." She paired the shirt with a white shorts and roman sandals.

"Given the temperatures in Australia at this time of year can rise to 40 degrees, it's not surprising that Kim, who is expected to marry Andy in October, opted for cool, summery clothing," it said.

Kim Sears' casual look was a departure from her usual fashion when she shows up to support fiance Andy Murray.

"On those occasions, she has chosen to wear a number of fitted, pretty dresses from a mix of High Street and designer stores," it said. She's often accessorised with a belt to cinch in her waist and worn heels or Burberry wedges to elongate her figure."

Her usual brands include Hobbs, the favored brand of Kate Middleton, Zara, Ted Baker and Reiss. She was also seen wearing Victoria Beckham's dress worth £925.

Andy Murray and fiancée Kim Sears have been dating since 2005 when they met at the US Open. She is the daughter of Nigel Sears, the former head of Law Tennis Association for women. Afterwards, Kim Sears has become a staple in his tennis matches as his loyal girlfriend can be seen cheering from the stands.

According to People magazine, Andy Murray proposed to fiancee Kim Sears, which was confirmed by the tennis star's management company. The engagement ring was reportedly worth £200,000, which would be a drop in a bucket to the tennis star's fortune estimated to be £30 million.