"In recent weeks, there were problems. They ended up spoiling the atmosphere and I preferred to stop. I do this job for fun and there were fewer of them," Perret told L'Equipe. , without giving further details.
Garcia had been working since last December with Perret, who managed to restore his confidence and clarify his style of play.
Under his leadership, the Lyonnaise went from 75th to 6th place in the world by winning three titles (Bad Homburg, Warsaw and Cincinnati) and climbing into the last four of the US Open.
Garcia, 29, is playing Monday for the second time in her career in the WTA Masters, an event bringing together the eight best players of the season.
For her first participation, in 2017, her best season so far, she made it to the semi-finals, beaten by Venus Williams.
./jr/hpa
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