How Diede de Groot won an unprecedented back-to-back calendar grand slam
By Issy Ronald, CNN At first glance, winning seems impossibly easy for Diede de Groot; an almost nonchalant habit of 69 consecutive victories, yielding a Golden Slam — all four grand slams and a Paralympic gold medal — in 2021, followed by a calendar grand slam in 2022. Together, these achievements amounted to a back-to-back
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