After being suspended for doping, Barbora Zahlavova Strycova came close to quitting tennis. But having finally put the perceived injustice behind her, the Czech player reached her first quarterfinal at a Grand Slam on Monday.

The 28-year-old Zahlavova Strycova was banned for six months by the International Tennis Federation after testing positive for the stimulant sibutramine in October 2012. She claimed she had inadvertently taken the drug through a supplement but was still suspended for the violation.

"I felt like everything is unfair and everything is like it happened," she said after beating former No 1 Caroline Wozniacki 6-2, 7-5 in the fourth round at Wimbledon.