Michael van Gerwen was the four-time defending champion after defeating Rob Cross 11–5 in the 2019 final.

However, he was eliminated from the competition in week 16, after an 8–2 defeat to Daryl Gurney, and a poor run of form saw him slip out of the playoffs, for the first time in his career.

[1] Glen Durrant, who was making his debut in the tournament, finished the regular season in 1st place (becoming only the third player to do so at the time, after van Gerwen and Phil Taylor) to set up a semi-final meeting between Gary Anderson.

[3] The following day it was announced that the Rotterdam dates would be moved to September, with the culmination of the tournament taking place there instead of London.

The May dates were postponed on 9 April 2020, with the PDC announcing a fully rescheduled calendar, the play-offs now taking place in Sheffield.

[5] Further changes were announced in July and August, with the cancellation of the events in Birmingham, Belfast, Leeds, Berlin, Glasgow, Manchester, Newcastle, Sheffield, and the double header in Rotterdam; and the reinstatement of The O2 Arena as the host of the final.

Ten nights were added to the calendar to be held behind closed doors at the Marshall Arena in Milton Keynes.

Phase 2 matches have a maximum of fourteen legs, allowing for the winner being first to eight or a seven-seven draw.

The players in this year's tournament were announced following the 2020 PDC World Darts Championship final on 1 January.

The nine challengers are not ranked in the table, but the main nine players can earn league points for a win or draw in the games against them.