SINGAPORE — Germany's Angelique Kerber criticised the format of the WTA Finals after she became distracted by qualifying permutations and exited the lucrative end-of-season event following a straight sets defeat by Lucie Safarova.
The world number seven had the advantage of knowing she only needed to take a set off the already eliminated Czech to reach the semis after watching Spain's Garbine Muguruza beat Petra Kvitova 6-4 4-6 7-5 in the penultimate White Group contest.
Yet the German looked unsettled and offered her worst display of the week as she was well beaten 6-4 6-3 at the Singapore Indoor Stadium on Friday.