(Reuters) - World number one Ash Barty might not defend her title at the season-ending WTA Finals in Mexico because of the "ridiculous" playing conditions at the venue and the timing of the tournament, her coach Craig Tyzzer said.

The WTA Finals, contested by the world's top eight singles players and eight doubles teams, were moved to Guadalajara from Shenzhen this week due to the COVID-19 pandemic and will begin on Nov. 8.