Gennady Golovkin aims to set up a world middleweight title unification fight with Billy Joe Saunders should his rematch with Saul 'Canelo' Alvarez be cancelled.
WBA, WBC, IBF and IBO title-holder Golovkin is poised to face Alvarez in Las Vegas on May 5, but the bout has been placed in doubt after the Mexican failed a voluntary drugs test.
Alvarez tested positive for trace levels of the banned drug clenbuterol, with his promoters blaming the finding on contaminated meat in his native Mexico.
The Nevada Athletic Commission (NAC) is investigating, but Golovkin has moved to identify an alternative opponent, with Saunders currently holding the WBO belt that would complete the Kazakhstani's set.
"If the fight can't happen, the next step for me is Saunders," Golovkin was quoted as saying by the Daily Mail. "It is my dream to get all the world championship belts."
He added: "I still hope the fight [with Alvarez] happens. It is the biggest fight in boxing right now and I would like to be on that level once again.
"But it is for the [NAC] to decide if he was positive or negative. I was surprised this happened. Knowing Canelo and his team, I didn't expect they were using some kind of forbidden substances."
The promotion is over. Now it’s time for hard work. pic.twitter.com/kx0WnNFpcM— Gennady Golovkin (@GGGBoxing) February 28, 2018
Alvarez vehemently denied any wrongdoing following news of his failed test, insisting: "I am an athlete who respects the sport and this surprises me and bothers me because it had never happened to me.
"I will submit to all the tests that require me to clarify this embarrassing situation and I trust that at the end the truth will prevail."
The first fight between Golovkin and Alvarez, in September 2017, ended in a controversial draw.
Saunders is set to defend his WBO title against Martin Murray in London on April 14.
|Leicester City 0 Southampton 0: Saints´ survival bid suffers fresh blow|
|Burnley 1 Chelsea 2: Conte´s men boost top-four chances with FA Cup warm-up|
|Fenerbahce-Besiktas abandoned after Gunes struck by object thrown from crowd|
|Quiros´ birdie-birdie finish earns a share of Rabat lead|
|New York Giants release Brandon Marshall|
|Real Sociedad 3 Atletico Madrid 0: Barca´s title party set to start|
|Thiem ready to up level for ´ultimate challenge´ of Nadal|
|Carrick reveals depression led to England exile|
|´Who are they?!´ - Accrington milk promotion with supermarket stunt|
|Mouthwatering Nadal-Djokovic quarter-final scuppered by Thiem|
|Stunning Gayle century ends Sunrisers´ unbeaten start|
|Conte names Hazard on bench for Burnley clash|
|Rooney denies rift with Everton boss Allardyce|
|Kane will leave Tottenham unless they win trophies, predicts Souness|
|Porzingis could miss 2018-19 season, Knicks owner says|
|Portugal´s Sanches has no chance of World Cup selection - Carvalhal|
|Spurs coach Popovich to miss game three after death of wife|
|Nadal reaches 14th straight Monte Carlo quarter-final|
|Better with one arm - Julio Cesar reveals Mourinho´s Casillas jibe|
|New Hamilton deal ´agreed in principle´ for Mercedes|
|Joseph likely to miss England´s tour of South Africa|
|Mourinho has nothing to prove - Pochettino|
|Bhatti pens one-year Glasgow extension|
|I have spoken to the chairman - Allardyce upset by Everton survey|
|Kit cat: Bath player offers signed shirt for missing pet|
|Emery dismisses talk of Real Sociedad offer|
|Thiem rallies to send Djokovic packing in Monte Carlo|
|Sidibe´s Monaco season over but World Cup return possible|
|Guardiola thanks ´unique´ City staff in celebration speech|
|Wan-Bissaka signs long-term Crystal Palace extension|
|Love will be ready for game three, assures Cavs coach Lue|
|Injured Raonic withdraws from Monte Carlo, Cilic advances|
|ECB announces 100-ball format for new domestic competition|
|Bottas aiming to overthrow Hamilton and claim world title|
|Rakitic to make comeback following finger surgery|
|FIFA dismisses Brewster racism complaint from U-17 World Cup final|
|Isak could benefit from Batshuayi injury - Stoger|
|Mitchell on target again in scrappy Roosters win|
|Shaw hopes to have earned FA Cup start|
|Mercado: If I smack Messi, I can´t go back to Argentina!|
|Salah wants Golden Boot to prove Chelsea doubters wrong|
|Chelsea´s Alonso gets three-game ban for Long challenge|
|Atletico clash absolutely vital to Arsenal´s season, admits Wenger|
|CSA wants interim agreement amid negotiations with South Africa players|
|Wenger still confident Wilshere will sign new deal|
|Read and Coles doubts for New Zealand´s France series|
|Paine vows to dial down Australia sledging|
|LeBron James denies he was blindsided by question on Popovich´s wife|
|Guardiola a friend as well as a boss, says Walker|
|Heaton: Europe a realistic possibility for Burnley|
|Late charge for the Golden Boot! - Smalling jokes about goalscoring form|
|Grand slams, walk-off hits highlight Blue Jays and Red Sox wins|
|Emery unsure when PSG star Neymar will return|
|Broncos boss Bennett walks out on press conference amid Bellamy speculation|
|Chiefs, Rams to play in Mexico City on November 19|
|LeBron James helps Cavs even series, Rockets rout T-Wolves|
|Marcelo backs Ronaldo to extend scoring run for Madrid|
|Copa Libertadores Review: Libertad preserve 100 per cent record, Corinthians stay unbeaten|
|Man United should have 10 more points – Mourinho laments inconsistency|
|Gombau sacked by Western Sydney Wanderers|
|Wife of San Antonio Spurs coach Gregg Popovich dies|
|Rafael: Van Gaal told me I could leave United after one-minute meeting|
|Klopp told Liverpool they could train naked because of Salah|
|Jazz star Mitchell to play game two against Thunder|
|Twins place Byron Buxton on 10-day DL with migraines|
|Zidane denies Bale problems, defends Benzema|
|Sarri: Napoli won´t change approach against Serie A rivals Juve|
|PSG will respect Les Herbiers, assures Emery|
|Chelsea boss Conte: It´s easier for Dyche at Burnley|
|It will be a great game - Allegri prepared for title showdown with Napoli|