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Daniil Medvedev faces heavy fine after throwing coins at umpire's chair | Wimbledon 2017 | The Guardian
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Serena Williams controversy not an example of discrimination in tennis | Opinions | collegiatetimes.com
![Chair umpire Mariana Alves, of Portugal, watches over the court during a match between Sloane Stephens and Johanna Larsson, of Sweden, at the Miami Open tennis tournament, Sunday, March 29, 2015 in Chair umpire Mariana Alves, of Portugal, watches over the court during a match between Sloane Stephens and Johanna Larsson, of Sweden, at the Miami Open tennis tournament, Sunday, March 29, 2015 in](https://l450v.alamy.com/450v/2cxn84y/ana-ivanovic-of-serbia-discusses-a-call-with-chair-umpire-mariana-alves-of-portugal-during-her-womens-singles-quarter-final-match-against-eugenie-bouchard-of-canada-at-the-australian-open-2014-tennis-tournament-in-melbourne-january-21-2014-reutersbobby-yip-australia-tags-sport-tennis-2cxn84y.jpg)
Chair umpire Mariana Alves, of Portugal, watches over the court during a match between Sloane Stephens and Johanna Larsson, of Sweden, at the Miami Open tennis tournament, Sunday, March 29, 2015 in
![Referee, Mariana Alves (R) of Portugal, helps Russia's Anastassia Rodionova who sprained her right ankle during her second round match against Japan's Ai Sugiyama at the Hansol Korea Open Tennis Championships in Referee, Mariana Alves (R) of Portugal, helps Russia's Anastassia Rodionova who sprained her right ankle during her second round match against Japan's Ai Sugiyama at the Hansol Korea Open Tennis Championships in](https://c8.alamy.com/comp/2E7P3NX/referee-mariana-alves-r-of-portugal-helps-russias-anastassia-rodionova-who-sprained-her-right-ankle-during-her-second-round-match-against-japans-ai-sugiyama-at-the-hansol-korea-open-tennis-championships-in-seoul-september-28-2006-reuterslee-jae-won-south-korea-2E7P3NX.jpg)
Referee, Mariana Alves (R) of Portugal, helps Russia's Anastassia Rodionova who sprained her right ankle during her second round match against Japan's Ai Sugiyama at the Hansol Korea Open Tennis Championships in
![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
![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)