tennis prodigy Jack Draper was forced to pull out of his ATP Tour debut at the Miami Open after collapsing on court.Draper was in first round action against Kazakhstan's Mikhail Kukushkin when the hot and humid conditions took their toll.The 19-year-old wildcard appeared in some discomfort during the the first set and had his heart-rate check by medics.Although he continued, Draper was forced to retire just moments later - the Sutton-born star collapsing to the ground while attempting to keep the ball in play on set point.
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