He followed that up with another open tournament victory in Spain, winning the Sitges Open, held from 13th December to 23rd December, with a score of 8.0/10 and edging out [[Ivan Cheparinov]] and [[Dmitrij Kollars]] in blitz tiebreaks. <ref>{{cite web |url=https://en.chessbase.com/post/sitges-abdusattorov-wins-after-thrilling-playoff|title=Sitges: Abdusattorov clinches first place in thrilling playoff |publisher=ChessBase |date=25 December 2021 |access-date=2021-12-25}}</ref>
== 2021 World Rapid Championship==
In December 2021, Abdusattorov participated in the [[World Rapid Chess Championship|2021 FIDE World Rapid Championship]], achieving a preliminary score of 9.5/13 in a four-way tie for first place, while defeating among others reigning [[World Chess Championship|world chess champion]] [[Magnus Carlsen]].<ref>[https://chess24.com/en/watch/live-tournaments/world-rapid-championship-2021/10/1/1 Abdusattorov–Carlsen], FIDE World Rapid Championship, Round 10, 28 Dec 2021, chess24.com</ref> With a subsequent win of 1.5/2 over [[Ian Nepomniachtchi]] in the tie-breaks, Abdusattorov won the Rapid Championship and became the youngest Rapid World Champion in history and the youngest World Champion overall in the three recognized time control formats.<ref>{{Cite web|title=Nodirbek Abdusattorov is Rapid World Chess Champion|url=https://worldchess.com/news/all/nodirbek-abdusattorov-is-world-rapid-chess-champion/|access-date=2021-12-28|website=worldchess.com|language=en}}</ref><ref>{{Cite web|date=2021-12-28|title=17-year-old Abdusattorov dethrons Carlsen as world rapid rapid champion|url=https://cvbj.biz/17-year-old-abdusattorov-dethrons-carlsen-as-world-rapid-rapid-champion.html|access-date=2021-12-28|website=CVBJ|language=en-US}}</ref><ref>{{Cite web|last=Holan|first=George|title=Chess: The amazing and icy 17-year-old Abdusattorov wins the gold in the fast games world after knocking down Carlsen {{!}} Chess News - Plainsmen Post|url=https://plainsmenpost.com/2021/12/28/chess-the-amazing-and-icy-17-year-old-abdusattorov-wins-the-gold-in-the-fast-games-world-after-knocking-down-carlsen-chess-news/|access-date=2021-12-29|language=en-US}}</ref><ref>{{Cite web|last=Levin (AnthonyLevin)|first=Anthony|title=World Rapid Chess Championship Day 3: Abdusattorov and Kosteniuk Crowned World Rapid Champions|url=https://www.chess.com/news/view/world-rapid-chess-championship-day-3-abdusattorov-and-kosteniuk-crowned-world-rapid-champions|access-date=2021-12-29|website=Chess.com|language=en-US}}</ref>
