World number one Aryna Sabalenka has criticised the Women's Tennis Association over the organisation of its season-ending Finals in Mexico.
Sabalenka, 25, beat Greece's Maria Sakkari 6-0 6-1 in her opening match on Sunday but said she felt "disrespected" by the sport's governing body.
"I am very disappointed with the WTA and the experience so far at the WTA Finals," said the Belarusian.
"This is not the level of organisation we expect for the Finals."
The venue for the Finals was only confirmed in early September after talks between the WTA and Saudi Arabia failed to yield an agreement for 2023.