Halep sustained the injury - a herniated disc - in training last month and hasn't practised or played tennis in the last four weeks.
Defeat the Czechs ensures Elina Swelly a ticket to the WTA Finals in 2018, which will be held in Singapore from 21 to 28 October this year. To play with the big tournaments are always hard. "So it was a tough decision but it's better for my health", WTA quoted Halep, as saying.
"My back is not OK". I didn't practice for the last four weeks. "I look forward to being back to compete in front of the fantastic crowd". Romanian did not dare to surgery and planned to finish the season, but back problems have still not allowed the first racket of the world again to go to court. She also became the first woman from her country to break into the top 10 in 22 years.
Mourinho's 'raw emotion' in Chelsea touchline drama no problem for Neville
United have just kept one clean sheet and have conceded a whopping 16 goals in the opening nine Premier League games this season.
Interestingly, her last win of the season came in the semi-final of Cincinnati, losing the title match to Kiki Bertens and wrapping up the season with for straight losses.
It is unfortunate that such an impressive season for Halep had to end in such unfortunate circumstances - a year which saw her grab her first maiden Major title, before consolidating her top spot in the rankings and ending the year as the world number one yet again.
The other singles players who will be doing battle for a US$7-million (S$9.6m) prize purse here are Australian Open champion Caroline Wozniacki, US Open victor Naomi Osaka, Wimbledon champion Angelique Kerber, Petra Kvitova, Sloane Stephens, Karolina Pliskova and Elina Svitolina.
Vikings RB Cook out Sunday vs. Jets
Less than two minutes into the fourth quarter, the seats began to empty, as Murray rushed 38 yards for another touchdown. Thielen caught nine passes for 110 yards, his seventh straight game of 100 yards receiving or more to start the season.
"I have such great memories from playing in Singapore in 2016 and 2017, and I can't wait to close out the year competing against the other elite players of 2018".
For the second year in a row, Cambodia's two contestants will be 14-year-old Chhieu Apsara from the Lycee Rene Descartes and 12-year-old Lao Pechreaksmey from Siem Reap.
Volunteers search for clues in the missing Wisconsin teen case
Evidence suggests Jayme was home at the time of their murders - but she is not considered a suspect. Deputies discovered Jayme Closs' parents fatally shot in their home in rural Barron.