![Chair umpire Mariana Alves works the 2004 U.S. Open quarter final match between Serena Williams and Jennifer Capriati in New York, September 7, 2004. Several questionable calls were made during the match Chair umpire Mariana Alves works the 2004 U.S. Open quarter final match between Serena Williams and Jennifer Capriati in New York, September 7, 2004. Several questionable calls were made during the match](https://c8.alamy.com/comp/2D3RYDR/chair-umpire-mariana-alves-works-the-2004-us-open-quarter-final-match-between-serena-williams-and-jennifer-capriati-in-new-york-september-7-2004-several-questionable-calls-were-made-during-the-match-as-capriati-went-on-to-defeat-williams-2-6-6-4-6-4-reutersjohn-sommers-ii-pjsv-2D3RYDR.jpg)
Chair umpire Mariana Alves works the 2004 U.S. Open quarter final match between Serena Williams and Jennifer Capriati in New York, September 7, 2004. Several questionable calls were made during the match
![Wimbledon 2017: Daniil Medvedev loses the plot by tossing coins at umpire's chair | Sports News,The Indian Express Wimbledon 2017: Daniil Medvedev loses the plot by tossing coins at umpire's chair | Sports News,The Indian Express](https://images.indianexpress.com/2017/01/daniil-medvedev-m.jpg)
Wimbledon 2017: Daniil Medvedev loses the plot by tossing coins at umpire's chair | Sports News,The Indian Express
![Ana Ivanovic of Serbia argues a call with chair umpire Mariana Alves (top) of Portugal during her women's singles quarter-final match against Eugenie Bouchard of Canada at the Australian Open 2014 tennis tournament in Melbourne January 21, 2014 ... Ana Ivanovic of Serbia argues a call with chair umpire Mariana Alves (top) of Portugal during her women's singles quarter-final match against Eugenie Bouchard of Canada at the Australian Open 2014 tennis tournament in Melbourne January 21, 2014 ...](https://c8.alamy.com/zooms/9/5db6bdc44da74ae988fde133f7881caa/2e69xma.jpg)
Ana Ivanovic of Serbia argues a call with chair umpire Mariana Alves (top) of Portugal during her women's singles quarter-final match against Eugenie Bouchard of Canada at the Australian Open 2014 tennis tournament in Melbourne January 21, 2014 ...
![Daniil Medvedev faces heavy fine after throwing coins at umpire's chair | Wimbledon 2017 | The Guardian Daniil Medvedev faces heavy fine after throwing coins at umpire's chair | Wimbledon 2017 | The Guardian](https://i.guim.co.uk/img/media/dfda9a42a7c2014482f39559ba945c79f687f8e9/0_182_4985_2991/master/4985.jpg?width=1200&height=900&quality=85&auto=format&fit=crop&s=8550f74d9060bc0adbf8caba19032447)
Daniil Medvedev faces heavy fine after throwing coins at umpire's chair | Wimbledon 2017 | The Guardian
![ČičakoholicS 🌠 on Twitter: "Mariana Alves rounds out the parade. She was happy&smiling during this men's dubs match😍 Tennis is lucky to have her. http://t.co/11RGraqTlh" / Twitter ČičakoholicS 🌠 on Twitter: "Mariana Alves rounds out the parade. She was happy&smiling during this men's dubs match😍 Tennis is lucky to have her. http://t.co/11RGraqTlh" / Twitter](https://pbs.twimg.com/media/Bwdx9G_IEAAqYBr.jpg)
ČičakoholicS 🌠 on Twitter: "Mariana Alves rounds out the parade. She was happy&smiling during this men's dubs match😍 Tennis is lucky to have her. http://t.co/11RGraqTlh" / Twitter
![New York - September 1, 2018: Chair Umpire Marijuana Veljovic During 2018 Us Open Match At Billie Jean King National Tennis Center In New York Stock Photo, Picture And Royalty Free Image. Image 114102423. New York - September 1, 2018: Chair Umpire Marijuana Veljovic During 2018 Us Open Match At Billie Jean King National Tennis Center In New York Stock Photo, Picture And Royalty Free Image. Image 114102423.](https://previews.123rf.com/images/zhukovsky/zhukovsky1812/zhukovsky181200311/114102423-new-york-september-1-2018-chair-umpire-marijuana-veljovic-during-2018-us-open-match-at-billie-jean-k.jpg?fj=1)
New York - September 1, 2018: Chair Umpire Marijuana Veljovic During 2018 Us Open Match At Billie Jean King National Tennis Center In New York Stock Photo, Picture And Royalty Free Image. Image 114102423.
![New York - September 5, 2017: Chair Umpire Mariana Alves During 2017 Us Open Match At Billie Jean King National Tennis Center Stock Photo, Picture And Royalty Free Image. Image 93828246. New York - September 5, 2017: Chair Umpire Mariana Alves During 2017 Us Open Match At Billie Jean King National Tennis Center Stock Photo, Picture And Royalty Free Image. Image 93828246.](https://previews.123rf.com/images/zhukovsky/zhukovsky1801/zhukovsky180100191/93828246-new-york-september-5-2017-chair-umpire-mariana-alves-during-2017-us-open-match-at-billie-jean-king-n.jpg)