The 27-year-old Sramkova won her first WTA title a week after falling in the Monastir final.
Japanese qualifier will face Marin Cilic in the quarterfinals.
Iga Swiatek won't be defending her China Open crown.
TC's Laver Cup coverage starts on Friday at 7 a.m. Eastern time.
"Coco, at just 20 years young, your future is incredibly bright," coach Brad Gilbert said.
Elina Svitolina will focus on rest and recovery the rest of this season.
John McEnroe on why he's optimistic of a Team World three-peat.
