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Double Dutch victory blows Canadian Open tennis draw wide open
['Gordon Darroch']
DutchNews.nl
Zverev appeared to have overcome an early wobble when he rescued a set point before taking the first set on a tie-break.
But Griekspoor hit straight back to take a 4-0 lead in the second set, going on to win 6-2, before breaking the German twice in the decider to win 6-4.
Van de Zandschulp matched his achievement as he overcame blustery conditions to see off the Russian number four seed, Daniil Medvedev, in straight sets.
The players broke each other twice in the second before Van de Zandschulp won the tie-break 7-5 with a sublime pass on his second match point.
Griekspoor will face the Italian Matteo Arnaldi, who knocked him out of this year’s French Open, in the round of 32, while Van de Zandschulp takes on Poland’s Hubert Hurkacz.