Jessica Pegula completed the WTA 1000 hard-court sweep with a victory over Elina Svitolina to secure the Dubai Tennis Championships title.
The withdrawal crisis at Dubai Open has deepened after teenage prospect Victoria Mboko became the latest high-profile player to exit the WTA 1000 event, adding to an already growing list of absentees.
Karolina Muchova produced a standout performance to upset Victoria Mboko and secure her first WTA 1000 title at the Qatar Open.
Elena Rybakina secured a historic payday in women's tennis by defeating world number one Aryna Sabalenka in straight sets at the WTA Finals.
Victoria Mboko earned her maiden WTA 250 title when she defeated Cristian Bucsa 7-5, 6-7, 6-2 in the Hong Kong Open final on Sunday.
For the second year in a row, Aryna Sabalenka and Iga Swiatek have failed to meet the WTA's minimum requirement for participation in WTA 500 events - and once again, it has resulted in penalties.