section_path: Professional career/2018: ITF Futures and Challenger Tour
section_name: 2018: ITF Futures and Challenger Tour
paragraph_text: 2018: ITF Futures and Challenger Tour
  
  Sinner began playing on the ITF Men's Circuit in early 2018. With his low ranking he could initially be directly accepted into only ITF Futures events. Nonetheless, he began receiving wild cards for ATP Challenger Tour events, the second-tier tour run by the Association of Tennis Professionals (ATP), in the second half of the year. His only ITF title of the year was in doubles, and he finished the season ranked No. 551.
  
  Sinner began playing on the ITF Men's Circuit in early 2018. With his low ranking he could initially be directly accepted into only ITF Futures events. Nonetheless, he began receiving wild cards for ATP Challenger Tour events, the second-tier tour run by the Association of Tennis Professionals (ATP), in the second half of the year. His only ITF title of the year was in doubles, and he finished the season ranked No. 551.