With Lemgo, he has won the National Cup of Germany in 1995, 1997 and 2002, the National Championship of Germany in 1997 and 2003, the EHF Cup in 2006 as well as the EHF Cup Winner's Cup in 1996.
Since 1999, he has been playing for TBV Lemgo, where he won the National Cup of Germany in 2002, the National Championship of Germany in 2003 and the EHF Cup in 2006.
In the first round of EHF Cup Bosna played against handball club Sutjeska from Nikšić, and passed after playing draw match in Nikšić, and scored win in Visoko.
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In 2007 club finished second in Premier League and will play in EHF Cup.
Besides his medical career, Arregui was from 2003 to 2008 president of CAI Balonmano Aragón handball team that played for the EHF Cup and the Asobal League.
World Cup | FIFA World Cup | 2010 FIFA World Cup | FA Cup | 1978 FIFA World Cup | 2006 FIFA World Cup | Davis Cup | Stanley Cup | Rugby World Cup | Cricket World Cup | 1986 FIFA World Cup | 1982 FIFA World Cup | Sprint Cup Series | 2007 Cricket World Cup | 2011 Rugby World Cup | 2002 FIFA World Cup | League Cup | Scottish Cup | Grey Cup | Football League Cup | 1998 FIFA World Cup | Challenge Cup | 2014 FIFA World Cup | Ryder Cup | 2003 Rugby World Cup | UEFA Cup Winners' Cup | Melbourne Cup | America's Cup | 1994 FIFA World Cup | 1990 FIFA World Cup |