On the undercard, Colombian Cesar Canchila outpointed Giovanni Segura to claim the WBA interim light-flyweight championship.
The 37-year-old Ruiz, who has lost twice to Valuev, stopped Adnan Serin on the undercard on Saturday.
On the undercard, Stephen Smith won the Commonwealth featherweight belt with a split decision over John Simpson.
That was on Enzo Maccarinelli's undercard and Rees is thrilled to be the headline act this time around.
On the undercard of the Pacquiao-Marquez contest, Bradley pummeled former champion Joel Casamayor into submission with relentless body punching.
Steve Bujaj (9-0), Claude Staten Jr. (1-0), Frank Galarza (9-0-1), Marcus Browne (3-0) and Eddie Gomez (13-0) won undercard fights.
On the undercard, champion Jorge Arce retained the WBC light flyweight title with a third-round technical knockout of Mexican compatriot Augustin Luna.
On the undercard, Dublin's Olympic bronze medallist Darren Sutherland stopped Siarhei Navarka of Belarus in the third round in his second pro fight.
Also on the undercard, Uganda's Kassim Ouma won the IBF light middleweight crown over Verno Phillips following a unanimous decision by the judges.
The Helenius-Gammer fight was set to take place on the undercard of the WBA heavyweight title bout between holder Nikolay Valuev and Ruslan Chagaev.
Gavin, 23, knocked out Graham Fern in his third professional bout on the undercard of Khan's WBA title fight with Andreas Kotelnik on Saturday.
On the undercard, Sara McMann, a 2004 silver medalist in wrestling at the Athens Olympics, won her UFC debut with a TKO over Sheila Gaff.
The Ukraine-born, New York-raised fighter is being lined up to face the Welsh champion on the Joe Calzaghe v Mikkel Kessler undercard on 3 November.
Bellew, 26, faces Nigerian Michael Gbenga in his first six-round contest, in Belfast, on the undercard of Martin Rogan v Sam Sexton on Friday night.
One of Burns' key sparring partners is Commonwealth featherweight champion John Simpson, who will put his title on the line against Liverpool's Stephen Smith on the undercard.
On the undercard, Hereford's Dazzo Williams retained his British featherweight title - and claimed a Lonsdale Belt - with a highly controversial points win over John Simpson .
British light heavyweight champion Peter Oboh has been stripped of his crown by the British Boxing Board of Control after refusing to defend his title on the undercard.
Gavin, 24, will be part of the undercard when Amir Khan fights in Newcastle in December, then he plans to return home to Birmingham for another contest in February.
But the Londoner, who now lives in Vegas, believes his victory - on the undercard of Joe Calzaghe v Bernard Hopkins - will eventually lead to a world heavyweight title.
Haye revealed that he broke his right hand in his victory over Valuev, while Ruiz suffered a nasty cut during his win against Adnan Serin on Saturday's undercard in Germany.
Many acts on the undercard shone in stark sunlight.
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And Maccarinelli is ready to take up the challenge and step out of Calzaghe's ominous shadow when he fights Afolabi on the undercard of Amir Khan's clash with Marco Antonio Barrera in Manchester.
Promoter Frank Warren believes Braehead Arena will be a sell-out for the fight, with Alex Arthur, who once held the belt now in Burns' possession, and rising star Paul Appleby on the undercard.
On the undercard of Maccarinelli's 21 July show in Cardiff, Gavin Rees challenges for Souleymane M'Baye's WBA light welterweight belt and Alex Arthur takes on Koba Gogoladze for the WBO interim super featherweight title.
The event for ex-Hull and St Helens favourite Prescott will also feature an undercard featuring professional boxing, a set from comedian Mike Lodge, speeches from rugby league legends and an auction including sporting memorabilia.
On the undercard earlier on Saturday, Commonwealth super-middleweight champion George Groves got off the floor and stopped Scot Kenny Anderson to defend his title and move closer to a possible showdown with arch enemy James DeGale.
On the undercard, Gary Lockett appears in an international 10-rounder as he aims to keep up the pressure on full WBO champion Kelly Pavlik, while Barrie Jones and Tony Doherty meet in a challenge for the Welsh welterweight title.
On the undercard, Gary Lockett appears in an international 10-rounder as he aims to keep up the pressure on WBO middleweight champion Kelly Pavlik, while Barrie Jones and Tony Doherty meet in a challenge for the Welsh welterweight title.
Former UFC champion Lyoto Machida won a lackluster split decision over 42-year-old veteran Dan Henderson on the undercard at Honda Center, and bantamweight Urijah Faber beat Ivan Menjivar with an acrobatic rear naked choke late in the first round.
In his first match in New York since losing in the 2011 U.S. Open final, Nadal returns Monday to face Juan Martin del Potro in the annual BNP Paribas Showdown, with Serena Williams and Victoria Azarenka as the undercard.
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