He currently coaches Iga Świątek and has previously worked with former Women's Tennis Association (WTA) world number ones Victoria Azarenka, Kim Clijsters, Simona Halep, Angelique Kerber, and Naomi Osaka.

[1] Fissette first took on the role of Kim Clijsters' coach upon the Belgian making a comeback onto the WTA Tour in 2009, having served as her hitting partner before her first retirement in 2007.

The pair also had a successful grass court season, with Konta becoming the first British woman since Virginia Wade in 1978 to reach the semifinals of Wimbledon.

However, it was announced on 18 October 2017 that Fisette and Johanna had mutually decided to split, following her string of bad results during the Asian tennis swing.

[8] Fissette began working with two-time Grand Slam champion and former world number one Angelique Kerber in 2018 after the German struggled throughout 2017 and fell out of the top-20.

[10] On 5 January 2020, The Japan Times published an article in which he was named as the coach of Naomi Osaka, the Australian Open Women's Champion in 2019.