Swiss Belinda Bencic reached the final of the Berlin WTA grass event for the second straight year after battling back to beat second seed Maria Sakkari 6-7, (6-8), 6-4, 6-4 on Saturday. Last year’s Berlin runner-up got off to a shaky start as Greece’s Sakkari raced into a two-game lead. She was then pegged back by Olympic champion Bencic, who however only converted two of her 11 break points in the opening set. Sakkari duly prevailed in the tiebreak at a sun-baked Steffi Graf stadium. But eighth seed Bencic boosted her build-up to Wimbledon, which begins on June 27, by seeing off two break poi…