Montel Vontavious Porter (MVP) also made his WWE in-ring debut at the event by beating Marty Garner.

No Mercy was first held by World Wrestling Entertainment (WWE) as a United Kingdom-exclusive pay-per-view (PPV) in May 1999.

[1] The main feud heading into No Mercy was between World Heavyweight Champion King Booker, Bobby Lashley, Batista, and Finlay.

Towards the end of the match, Lashley tagged in Batista, who pinned Booker for the win after a spinebuster.

[10][11][12] The next week on SmackDown!, Finlay began degrading Batista, saying he is probably hiding in a hole licking his wounds.

General Manager Theodore Long then scheduled Finlay to wrestle Lashley later that night to determine the number one contender to the World Heavyweight Championship at No Mercy.

Midway through the match, Batista and Finlay brawled outside the ring and into the crowd, leaving Regal on his own against Lashley.

Long subsequently booked Kennedy for No Mercy against an opponent he had never faced, who turned out to be The Undertaker.

[19] However, the Undertaker made his presence known to Kennedy, as he informed him, "I show no mercy, and you will rest in peace".

[15][17][24][25] Before the event went live on pay-per-view, Jimmy Wang Yang defeated Sylvan in a dark match.

After a back and forth match, Helms took control until Hardy was able to counter a Shining wizard with a Twist of Fate for the win.

[28][27] Next was the WWE Tag Team Championship match between the champions Paul London and Brian Kendrick, with Ashley, and K.C.

[32] The sixth match was the encounter between William Regal and his opponent, who was revealed to be Chris Benoit.

Benoit, who was returning after a five-month sabbatical, cut Regal open halfway through the match after a headbutt.

[28][33] In the main event, King Booker faced Batista, Finlay and Bobby Lashley in a fatal four-way match for the World Heavyweight Championship.

[35] After getting out of the shower and having another argument with Vito, Regal ran off with his towel falling off, exposing his buttocks and, for a brief second, his penis.

[50] Matt Hardy reformed the Hardys tag team with his brother Jeff, and began a feud with MNM, (Johnny Nitro and Joey Mercury),[51][52] which included a ladder match at Armageddon, in which Paul London and Brian Kendrick were also involved.