Kell Brook and Gennady Golovkin go toe-to-toe at Londons O2 Arena on Saturday night with both men putting their unbeaten record on the line.?In the video above, ESPN boxing correspondent Steve Bunce discusses his four favourite bouts from history between two previously undefeated fighters. But which was the best fight? Vote below...Muhammad Ali vs. Joe FrazierDate: March 8, 1971 Venue: Madison Square Garden, New York Pre-fight record: 31-0 (25 KO) vs. 26-0 (23 KO)Dubbed the Fight of the Century, Frazier downed Ali in 15 rounds to retain his WBC and WBA world heavyweight titles. Ali exacted his revenge two years later, winning in 12 at the same venue. He beat Frazier again in 1975 in the so-called Thrilla in Manila.Floyd Mayweather vs. Saul AlvarezDate: Sept. 14, 2013 Venue: MGM Grand, Las Vegas Pre-fight record: 44-0 (26 KO) vs. 42-0 (30 KO)In the richest fight of all time, Mayweather won with all scorecards in his favour except one. Mayweather ended his career a year and four fights later and, crucially, still undefeated. The defeat remains Alvarezs only reverse and he takes on Britains Liam Smith in Texas on Sept. 17 for the WBO light middleweight title.Mike Tyson vs. Michael SpinksDate: June 27, 1988 Venue: Convention Hall, Atlantic City Pre-fight record: 34-0 (30 KO) vs. 31-0 (21 KO)Not one for the Spinks family scrapbook as Tyson knocked him out in just 91 seconds to become the lineal champion. It proved to be Spinks last fight. Tysons first defeat came two years later against Buster Douglas. He went on to lose five more bouts in a career spanning 20 years.Carlos Zarate vs. Alfonso ZamoraDate: April 23, 1977 Venue: Inglewood Forum, Los Angeles Pre-fight record: 38-0 (37 KO) vs. 29-0 (29 KO)A showdown between two of Mexicos biggest names was inevitable and, in 1977, the so-called Battle of the Z Boys was won in the fourth round by Zarate. The defeat knocked Zamoras career off the rails, and he went on to lose four of his remaining eight fights before calling it a day. Zarates first loss came a year later, and his career ended in 1988 with a record of 66 wins and four defeats.Ryan Yarbrough Jersey . First off, the fans ripped the Cubbies introduction of a fuzzy new kid-friendly mascot named "Clark". Charlie Morton Rays Jersey . The International Olympic Committee released the official list of bid cities on Friday after the deadline for applications had passed. The candidates -- all previously announced in their own countries -- are: Almaty, Kazakhstan; Beijing; Krakow, Poland; Lviv, Ukraine; Oslo, Norway; and Stockholm. https://www.cheapraysonline.com/296i-oliver-drake-jersey-rays.html . -- Hunter Smith scored the winner with just 12 seconds remaining in the third period as the Oshawa Generals edged the host Sarnia Sting 5-4 on Friday in Ontario Hockey League action. Tyler Glasnow Jersey . Hamelin, who triumphed in the 500 on Saturday, edged out Victor An of Russia by 0.021 seconds to maintain his lead in the World Cup standings. Russias Vladimir Grigorev was third. In the relay, Canada took control six laps from the finish line to beat Russia and the Netherlands. Yandy Diaz Jersey . One game after a miserable showing in Oklahoma City, Gay tied a career high with 41 points and the Sacramento Kings cruised to a 114-97 victory at the New Orleans Pelicans on Tuesday night.Paris, France (Sports Network) - Swiss icon Roger Federer was an easy second- round winner Wednesday at the 2013 French Open. The second-seeded former world No. 1 superstar dismantled helpless Indian Somdev Devvarman 6-2, 6-1, 6-1 in a brisk 82-minute affair on Court Lenglen. Devvarman was a two-time NCAA champion while attending the University of Virginia. "I tried to finish the match quite quickly, because I was afraid it would rain," Federer said. "So I was very focused, and Im very happy for that." Federer boasts a mens-record 254 Grand Slam singles match victories and is now third on the mens Open-Era list with 56 wins at the French. The 31-year-old veteran is the all-time mens leader with 17 Grand Slam singles titles, including last years Wimbledon championship and the 2009 French Open crown. The Swiss great is also a four-time Roland Garros runner-up to Rafael Nadal, who also beat his long-time rival Federer in the Rome Masters finale just two weeks ago. Federers third-round opponent will be quality Frenchman Julien Benneteau, who upset the Swiss legend in Rotterdam earlier this season. Meanwhile, fourth-seeded David Ferrer and sixth seed Jo-Wilfried Tsonga also secured spots in the third round. Ferrer, a semifinalist at Roland Garros last year, broke serve eight times in routing fellow Spaniard Albert Montanes 6-2, 6-1, 6-3 on the famed red clay in Paris. Montanes was fresh off his clay-court title in Nice. The gritty Ferrer will next take on another compatriot, Feliciano Lopez, who beat Portuguese Joao Sousa by a 3-6, 6-3, 6-4, 6-4 margin. The heavy French crowd favorite and former Australian Open runner-up Tsonga discarded veteran Finnish left-hander Jarkko Nieminen 7-6 (8-6), 6-4, 6-3, while 10th-seeded Croat Marin Cilic handled promising Aussie Nick Kyrgios 6-4, 6-2, 6-2 on Day 4. Nieminen was a runner-up in Germany last week. In other second-round play involving top-16 seeds, No. 11 Spaniard Nicolas Almagro drubbed Frances Edouard Roger-Vasselin 6-2, 6-4, 6-3, formidable No. 14 CCanadian Milos Raonic defeated quality French left-hander Michael Llodra 7-5, 3-6, 7-6 (7-3), 6-2, and No.dddddddddddd 15 Frenchman Gilles Simon overcame Uruguays Pablo Cuevas 6-7 (2-7), 6-1, 6-1, 6-1. Also in the second round, 18th-seeded American Sam Querrey erased Czech Jan Hajek 6-4, 7-5, 6-4; 20th-seeded Italian Andreas Seppi (20) outlasted Slovenian Blaz Kavcic 6-0, 7-6 (7-3), 6-7 (2-7), 4-6, 6-3; 23rd-seeded South African slugger Kevin Anderson overcame Russian Evgeny Donskoy 6-7 (8-10), 6-1, 7-5, 6-2; 25th-sdeeded Frenchman Jeremy Chardy bested Spaniard Roberto Bautista Agut 6-1, 7-5, 6-4; a 30th-seeded Benneteau snuck past German Tobias Kamke 7-6 (11-9), 7-5, 5-7, 0-6, 6-4; and 32nd-seeded Spaniard Tommy Robredo fought back from two-sets-to-love down to beat down Dutchman Igor Sijsling 6-7 (2-7), 4-6, 6-3, 6-1, 6-1. In some first-round action on Wednesday, No. 8 seed Janko Tipsarevic of Serbia topped Frenchman Nicolas Mahut 6-2, 7-6 (7-4), 6-1 and 24th-seeded rising Frenchman Benoit Paire defeated former Aussie Open runner-up Marcos Baghdatis of Cyprus 3-6, 7-6 (7-1), 6-4, 6-4. Some other second-round results saw flashy French crowd favorite Gael Monfils dismiss talented Latvian Ernests Gulbis 6-7 (5-7), 6-4, 7-6 (7-4), 6-2 and Serb Viktor Troicki outlast Spaniard Daniel Gimeno-Traver 4-6, 7-6 (7-4), 6-0, 6-7 (7-9), 6-4. Monfils was last weeks runner-up in Nice. Additional opening-round wins came for Pole Lukasz Kubot and Argentine Horacio Zeballos, who stunned Nadal in a clay-court final in Chile back in February. On Thursday, second-round matches will come for current world No. 1 Novak Djokovic and the third-seeded former top-ranked Nadal. Djokovic will play rising Argentine Guido Pella, while the seven-time French Open champion Nadal will encounter Slovak Martin Klizan. Nadal beat the reigning Aussie Open champ Djokovic in last years marquee French Open finale. Thursdays schedule will also feature seventh-seeded Frenchman Richard Gasquet, Tipsarevic and ninth-seeded Swiss Stan Wawrinka. ' ' '