The 2020 Davis Cup World Group I was held on 5–6 March 2021 and 17–19 September 2021. The eight highest-ranked winners of the World Group I ties automatically progressed to the 2022 Davis Cup Qualifying Round. The four lowest-ranked winners took part in an additional knock-out tie in November 2021, the two winners progressing to the 2022 Davis Cup Qualifying Round and the two losers contesting the 2022 Davis Cup World Group I Play-offs. The losing nations from the World Group I ties will compete in the 2022 Davis Cup World Group I Play-offs.