Jabuer, the top seed in the Nancy Richey group, has only played one tournament since reaching the US Open final.
Pegula has had a strong season so far, winning her maiden WTA 1000 title at the Guadalajara Open, where she defeated Maria Sakkari.
There is no surprise that world no. 1 and top seed Iga Swiatek is the strongest favourite for the title. However, she will have her work cut out for her.
The WTA released the tournament calendar for the first half of the 2022 season on Monday, beginning with the Australian Summer of Tennis in January.
Garbine Muguruza continued her renewed ascent up the ladder with a win in the WTA Finals. The key now would be to sustain this form in 2021.
No.4 seed Maria Sakkari clinched her spot in the semifinals of the Akron WTA Finals Guadalajara with a three-set win over Sabalenka.
On Day 1 of the 2021 Akron WTA Finals Guadalajara, the Czech star overcame a set deficit to win the match in a dramatic fashion.
The WTA Finals 2021 will close out the women's tennis season at the end of the year and so far, four of the eight spots in the tournament have been filled.