The high altitude makes it difficult to breathe and to control the ball field.

Several of the eight players, the best in the world, who have qualified have come to Guadalajara in good time to adapt to the conditions.

- The first day I came here, I should not say that I was surprised, I was shocked that I could not control anything, says the Belarusian world setter Aryna Sabalenka according to Reuters.

- I had a hard time finding the right string at first but managed to find the perfect pressure.

I got to try myself and feel better and better every day, says Sabalenka.

Muguruza: "Never experienced anything like this"

Two-time Grand Slam winner Garbine Muguruza has played in Mexico several times but never in such conditions.

- It is difficult to adapt to these conditions.

I have never experienced anything like this.

It is difficult to control the ball field and to play at such a high altitude.

It's tough but it's tough for everyone, says the Spaniard.

The tournament was to be decided in Shenzhen, China, but was moved due to the pandemic.

At 21.00 Swedish time, the tournament begins with Barbora Krejcikova against Anett Kontaveit in group Teotihuacan (an archeological site that is on the UNESCO World Heritage List).

To the game schedule.