select Cornet for the upcoming Fed Cup team tie against Belgium in February 2018, to allow her time to "prepare her defence" in front of an independent tribunal set up by WADA. On 15 May, the ITF announced that the independent tribunal set up by WADA had cleared Cornet of the charge of missing the three out-of-competition drugs tests that were to be conducted between November 2016 and October 2017 because the Doping Control Officer (DCO) did not satisfy all of the requirements of article I.4.3 of the International Standard for Testing and Investigations in relation to the third missed drugs test. Specifically, the DCO did not do "what was reasonable in the circumstances (i.e. given the nature of the specified location) to try to locate Cornet, short of giving her any advance notice of the test". For that reason, the third missed drugs test declared against Cornet no longer stood. On 22 July, she won her sixth WTA Tour singles title at the Swiss Open, held in Gstaad. At the US Open, Cornet was given a code violation under Grand Slam rules for changing her shirt while on the court. Some fans and players criticised the ruling as male players are allowed to change their shirts while on court. The WTA said the ruling was "not based on a WTA rule, as the WTA has no rule against a change of attire on court". The next day, tournament officials clarified the policy by saying that players of any gender would be allowed to change their shirt while sitting in their chair, and female players could also change their shirts in a private location off the court, for which they would not be assessed a bathroom break. 2019: 13th singles final Cornet played for France at the Hopman Cup, alongside Lucas Pouille. She lost all her singles matches. France finished last in their group. In Hobart, the sixth-seeded Cornet won her first three matches in straight sets to reach the semifinals, where she lost to Sofia Kenin. At the Australian Open, Cornet was eliminated in the second round by Venus Williams. Cornet lost in the first round at the St. Petersburg Ladies' Trophy to Anastasia Pavlyuchenkova. Playing for France in the Fed Cup tie against Belgium, Cornet played one match and won beating Elise Mertens. In the end, France won the tie 3–1. At the Dubai Tennis Championships, Cornet fell