2010

He was selected the Slovenian football player of the year.

2010

He transferred to the English Championship football club Hull City.

2010

As the captain of Slovenian national team Koren led his side through to the play-off, where the team beat Russia and thus qualified for the 2010 FIFA World Cup in South Africa.

2009

In January 2009, he was the first Slovenian football player to score a goal in the elite England´s Premier League in the match against Middlesbrough FC.

2009

He was selected the West Bromwich Albion FC player of the year for the 2008/2009 season (supporters' award).

2007

He was selected the Slovenian football player of the year.

2007

He transferred to the English football club West Bromwich Albion.

2006

His football club Lillestrøm was runner-up in the Scandinavian Royal league.  

2006

On 7 October 2006, he scored the first goal for the Slovenian national team in the match against Luxembourg.

2006

Lillestrøm was runner-up in the UEFA Intertoto Cup 2006.

2006

He received the Kniksen award for the midfielder of the year in the Norwegian football premiership.

2005

Lillestrøm was runner-up in the Norwegian Football Cup.

2004

He transferred to the Norwegian FC Lillestrøm.

2003

Debut for the Slovenian national team:  Cyprus, qualification for the European Championship 2004