(Reuters) - Russian Karen Khachanov overcame a mid-match wobble to beat home favourite Jan-Lennard Struff 6-3 3-6 6-4 on Wednesday and reach the Halle Open quarter-finals in Germany.
World number nine Khachanov converted two of his seven break point chances to prevail in an hour and 43 minutes and takes on either Stuttgart champion Matteo Berrettini or world number 69 Andreas Seppi in the last-eight stage.
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