Regis Prograis vs Josh Taylor, was a professional boxing match contested between WBA (Super) and WBC Diamond light-welterweight champion, Regis Prograis, and IBF light-welterweight champion, Josh Taylor, with the vacant The Ring light-welterweight title also on the line. The fight was the World Boxing Super Series: light-welterweight final, with the winner receiving the Muhammad Ali Trophy. The bout took place on 26 October 2019 at The O2 Arena, with Taylor winning by majority decision.

On 30 June 2018, it was announced that Taylor would join the eight man tournament.^[1] It was later announced on 13 July 2018 that Prograis would also be taking part in the tournament.^[2]

Prograis defeated his quarter-final, and semi-final opponents, Terry Flanagan, and Kiryl Relikh, to win the WBA light welterweight title.^[3][4] Taylor defeated his quarter-final, and semi-final opponents, Ryan Martin, and Ivan Baranchyk, to win the IBF light welterweight title.^[5][6]

On 31 August 2019, the unification bout between Prograis and Taylor was announced to take place on 26 October at The O2 Arena on Sky Sports Box Office.^[7]

Taylor won by a majority decision with scores of 115–113, 117–112 in his favour, and 114–114 even.^[8]

Following Taylor's win, in the post-fight interview, Taylor challenged WBC and WBO light-welterweight champion José Ramírez to an undisputed title fight. Prograis expressed interest in a rematch.

^Note 1 For WBA (Super), IBF, The Ring and WBC Diamond light-welterweight titles
^Note 2 For WBO Inter-Continental heavyweight title
^Note 3 For European cruiserweight title
^Note 4 For WBA Continental welterweight title
^Note 5 For WBC International Silver light-middleweight title