After bowing out of the WTA Finals with a loss to Agnieszka Radwanska, Simona Halep said: "I was done. No energy anymore."
Simona Halep revealed she simply ran out of energy as her WTA Finals campaign came to an end with a straight-sets defeat to Agnieszka Radwanska on Thursday.
Halep, the top seed in Singapore due to the absence of world number one Serena Williams, battled hard in the first set, only to lose a tie-break she had led 5-1.
That dramatic turnaround was enough to throw the 24-year-old Romanian completely off her game and Radwanska raced to victory thereafter - taking the second set 6-1.
"I was done," said Halep.
"No energy anymore. I was tired. I felt that I lost the chance to win the first set and probably I lost the chance to win the match in that moment.
"Yeah, my coach was telling me many things, but I couldn't hear because I was done and I was very nervous there.
"But, you know, it's good that happened. Next time I will know that if I'm not well-prepared physical I have just to do something else on court."
Halep is now ready for a break after a demanding 2015 campaign.
"I'm happy with my year. I just want to take the holiday now. I don't want think about tennis anymore. Then I will be stronger," she added.