Sexism in sport is negative because it gives viewers of the sport (e.g) tennis that woman are not equal. This is due to the outfits as well as the pay and some of the comments that are made about them are highly sexist such as their body shapes being idolized and criticised if they do or do not fit the mold of the perfect athletic woman body.  People like Serena Williams and Amelie Mauresmo are " criticised for being too masculine, too strong. If you’re a leggy blonde, you’ll be asked to do a little twirl for the camera. If you’re not, you’ll be largely ignored, unless you beat a pretty player to win Wimbeldon — then you’ll be summarily abused on Twitter and called “too ugly to rape”. 
http://junkee.com/well-never-get-rid-of-sexism-in-tennis-until-women-are-given-five-setss/75479

Female tennis players are often accused of "riding on the coat tails of men" and some men are even saying that  “If I were a lady player I’d go down every night on my knees and thank God that Roger Federer and Rafa Nadal were born because they have carried this sport.” some woman say that tennis will never be equal unless woman and men can both play 5 sets without being criticised"
  http://junkee.com/well-never-get-rid-of-sexism-in-tennis-until-women-are-given-five-setss/75479

Sexism in sport causes a negative impact on woman who's body shape doesn't conform to the 'normal body shape,' there are athletes like Serena Williams and Caster Semenya  who are criticised for being to masculine and muscular.  Caster Semenya, a South African track athlete, was highly criticised  and then gender tested as people believed that she was cheating and was actually a man. This has not only happened to Semenya, it has also happened to Indian runner Dutee Chand, people had decided when she had competed only months earlier at a track and field event that, 'her physique seemed suspiciously masculine: Her muscles were too pronounced, her stride was too impressive for someone who was only five feet tall.' She had to undergo humiliating testing just to show that she was in fact a woman, though as her results came back swayed in a direction that the results could not be positively concluded that she was a man or a woman, she was banned from competing.
http://www.nytimes.com/2016/07/03/magazine/the-humiliating-practice-of-sex-testing-female-athletes.html?_r=1

Sexism in sport affects New Zealanders  as it has significant impacts on how woman are perceived in sport, woman are assumed to be 'lesser athletes' in many sports and are not paid or recognized as much as their male counterparts.  New Zelaland claimes that there is no longer any sexism in the country but if you look closely enough, the tell-tale signs are still there. Earlier this year champion surfer Mischa Davis won the Billabong Pro open women's surfing competition at Whangamata, and with it a first prize of $1000. Organisers then awarded the same amount to the winner of their bikini parade. 
http://www.stuff.co.nz/sport/opinion/637729/i-Sport-the-last-bastion-of-sexism-i