Pakistan, June 20 -- World number one Aryna Sabalenka stormed back from the cusp of defeat to beat Czech Nikola Bartunkova and reach the last four of the WTA event in Berlin on Friday.

Sabalenka won 2-6, 7-6 (7/2), 6-4 in sweltering conditions in the German capital in the traditional Wimbledon warm-up event.

"I was thinking 'wow, that's how it is to play against me'," a smiling Sabalenka said of her opponent's early dominance, adding: "I thought it was her match for sure. I was just trying to stay in the game.

"I think it was a lucky match. I somehow, miraculously, came back in that second set."

Bartunkova, the world number 62, stormed to take the first set and led 4-0 in the second as a visibly frustrated Sabalenka struggled on serve...