"It is an honor to be the first Greek woman to qualify for the WTA finals in Guadalajara.
Viva Mexico ", writes Sakkari on Instagram.
Kalinskaja had a tightly bandaged left thigh and did not even run on the final stop ball before she, after wearing a mouth guard, gave up the match.
In the quarterfinals, Sakkari meets the winner of Veronika Kudmertova and Simona Halep.
Ashleigh Barty, Aryna Sabalenka, Barbora Krejcikova and Karolina Pliskova have previously qualified for the WTA playoffs, which were moved from China to Mexico due to the pandemic.
The winner can take home SEK 38 million
This means that three places are still open for the tournament 10-17 November.
The WTA playoffs have been held since 1972 but were canceled due to the pandemic last year.
The tournament is a coin toss and the winner takes home just over SEK 30 million.
Each win in the group stage, which consists of three matches, gives an additional SEK 2.6 million.
In the event of a full dividend, a winner can win around SEK 38 million.