Rublev is the last remaining seed in the Halle draw after Roger Federer and world number two Daniil Medvedev were among the big-name casualties in the early rounds. Halle Westfallen: Russia’s Andrey Rublev admitted he had to raise his game to reach the semi-finals of the ATP grass-court tournament in Halle by beating 2011 champion Philipp Kohlschreiber on Friday. “After …
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