[PAR] [TLE] Sergio Martínez (boxer) [SEP] Sergio Gabriel Martínez (born February 21, 1975) is an Argentine former professional boxer who competed from 1997 to 2014.  He held the unified WBC, WBO, "Ring" magazine, and lineal middleweight titles between 2010 and 2014, making six successful defenses of the latter two titles.  Martínez's 50-month reign as lineal champion ranks as one of the longest in middleweight history.  He also fought at light middleweight, where he held the IBO title from 2003 to 2005, and the WBC interim title in 2008 (later elevated to full world champion status the following year). [PAR] [TLE] Richard Williams (boxer) [SEP] Richard "The Secret" Williams ( (1971--) 09 1971 (age (2017)-(1971)-((11)<(05)or(11)==(05)and(30)<(09)) ) is an English professional light middle/middle/super middleweight boxer of the 1990s, 2000s and 2010s who won the International Boxing Organization (IBO) light middleweight title, and Commonwealth light middleweight title (twice), and was a challenger for the International Boxing Organization (IBO) light middleweight title against Sergio Gabriel Martinez, and British Boxing Board of Control (BBBofC) British middleweight title against Howard Eastman, his professional fighting weight varied from 149+3/4 lb , i.e. light middleweight to 162+1/4 lb , i.e. super middleweight.  Richard Williams is trained by Brian Lawrence, and managed by Barry Hearn, and John Rooney.
[PAR] [TLE] Sergio Martínez ( boxer ) [ SEP ] Sergio Gabriel Martínez ( born February 21 , 1975 ) is an Argentine former professional boxer who competed from 1997 to 2014 . He held the unified WBC , WBO , " Ring " magazine , and lineal middleweight titles between 2010 and 2014 , making six successful defenses of the latter two titles . Martínez 's 50-month reign as lineal champion ranks as one of the longest in middleweight history . He also fought at light middleweight , where he held the IBO title from 2003 to 2005 , and the WBC interim title in 2008 ( later elevated to full world champion status the following year ) . [PAR] [TLE] Richard Williams ( boxer ) [ SEP ] Richard " The Secret " Williams ( ( 1971 - - ) 09 1971 ( age ( 2017)-(1971)-((11)<(05)or(11)==(05)and(30)<(09 ) ) ) is an English professional light middle / middle / super middleweight boxer of the 1990s , 2000s and 2010s who won the International Boxing Organization ( IBO ) light middleweight title , and Commonwealth light middleweight title ( twice ) , and was a challenger for the International Boxing Organization ( IBO ) light middleweight title against Sergio Gabriel Martinez , and British Boxing Board of Control ( BBBofC ) British middleweight title against Howard Eastman , his professional fighting weight varied from 149 + 3/4 lb , i.e. light middleweight to 162 + 1/4 lb , i.e. super middleweight . Richard Williams is trained by Brian Lawrence , and managed by Barry Hearn , and John Rooney .
Who reigned for 50 months as lineal champion  and fought Richard Williams?
Who reigned for 50 months as lineal champion and fought Richard Williams ?
Sergio Gabriel Martínez
Sergio Gabriel Martínez