Question: Who is the older brother of the current captain of Hamburger SV in the German Bundesliga?

Context articles: Gōtoku Sakai
Harald Spörl
2017–18 Hamburger SV season
Uli Stein
Goson Sakai
Fata Salkunič
SC Germania Hamburg
Mehdi Mahdavikia
Sergej Barbarez
Hamburger SV II

Gōtoku Sakai (酒井 高徳 , Sakai Gōtoku , born 14 March 1991) is a Japanese footballer.
 He currently plays for and captains Hamburger SV in the German Bundesliga and is a player for the Japanese national team, mainly as a right back.
Harald Spörl (born October 31, 1966 in Bamberg Germany) is a German former footballer.
 He currently works for Hamburger SV as a scout.
 From July 1987 to December 2000, Spörl played Midfielder for the Hamburger SV team.
 He left the Hamburg SV team in December 2000, and joined the LR Ahlen team as Midfielder until June 2002.
The 2017–18 Hamburger SV season is the 99th season in the football club's history and 55th consecutive and overall season in the top flight of German football, the Bundesliga, having been promoted from the Oberliga Nord in 1963.
 In addition to the domestic league, Hamburger SV also are participating in this season's edition of the domestic cup, the DFB-Pokal.
 This is the 65th season for Hamburg in the Volksparkstadion, located in Hamburg, Germany.
 The season covers a period from 1 July 2017 to 30 June 2018.
Ulrich "Uli" Stein (born 23 October 1954 in Hamburg) is a former German football player.
 He was a goalkeeper and between 1978 and 1997, made 512 appearances in the German Bundesliga.
 He began his career in 1978 with Arminia Bielefeld.
 After two years, he moved to Hamburger SV where he played from 1980 to 1987.
 From 1987 to 1994 he played for Eintracht Frankfurt, but in 1994 he returned to Hamburger SV.
 One year later, he transferred to Arminia Bielefeld again.
 He retired during the 1996–97 season.
Goson Sakai (酒井 高聖 , Sakai Gōson , born March 20, 1996) is a Japanese football player.
 He's the younger brother of Gōtoku and Noriyoshi Sakai.
Fata Salkunič is a currently unattached Slovenian football midfielder, currently playing for USV Jena in the German Bundesliga.
 She previously played for ZNK Maribor and Krka Novo Mesto in the Slovenian League, Hamburger SV in the Bundesliga and FC Basel in the Swiss Nationalliga A.
Sport-Club Germania Hamburg - often referred to as SC Germania 1887 - was a sports club from the northern German metropolis Hamburg.
 It was created on 29 September 1887 through the merger of the track and field clubs "Hohenfelder Sportclub" and "Wandsbek-Marienthaler Sportclub", which both were founded in 1884.
 Germania was six times winner of the association football Championship of Hamburg and in 1900 a founding member of the German football association.
 Germania merged on 2 June 1919 with "Hamburger SV von 1888", Northern German champions of that year, to form today's Hamburger SV, six times German champions and European Cup of Champions' winner of 1983.
 Hamburger SV carries the foundation date of Germania as its foundation date and uses the colours of Germania in its badge.
Mehdi Mahdavikia (Persian: ‎ ‎ , born 24 July 1977 in Tehran) is a retired Iranian football player who played for Persepolis, Hamburger SV, Eintracht Frankfurt, Steel Azin, Damash Gilan and also the Iran national football team.
 He has won the Asian Young Footballer of the Year award in 1997, as well as Asian Footballer of the Year in 2003.
 He was captain of the Iran national football team from 2006 to 2009, and currently is the fourth most capped Iranian International after Ali Daei, Javad Nekounam and Ali Karimi.
 From the Bank Melli youth academy, he joined Persepolis and after his performance in the 1998 FIFA World Cup was transferred to Hamburger SV in the Bundesliga, where he played for eight seasons.
 He usually played as a right winger or full-back.
 He was known for his crossing, speed and dribbling.
 He announced his retirement on 14 March 2013 from football world.
 His last match as a football player was against Sepahan in the Hazfi Cup final on 5 May 2013.
Sergej Barbarez (born 17 September 1971) is a Bosnian former professional footballer who played for several clubs in the German Bundesliga and the Bosnia and Herzegovina national team.
 He is considered as one of the all-time great players of Hamburger SV where he scored 65 goals in 174 Bundesliga games.
 Mainly used as a second striker, he has also played as an attacking midfielder or left winger.
Hamburger SV II are the reserve team of German association football club Hamburger SV.
 Until 2005 the team played as Hamburger SV Amateure.