Who is the older brother of the current captain of Hamburger SV in the German Bundesliga?
Gōtoku Sakai 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.
Ronald de Boer Ronaldus "Ronald" de Boer (] ; born 15 May 1970) is a Dutch former football midfielder who played for the Netherlands national team as well as a host of professional clubs in Europe. He is the older twin brother of Frank de Boer.