European champion

In 2005, she won her first senior gold medal at the European Indoor Championships in Madrid. But once again she failed to reach the final of the 2005 World Championships staged in Helsinki.^[1]

She came third in the 2006 World Indoor Championships held in Moscow. That year Kallur, in her biggest achievement to date, claimed the 100 m hurdles title at the European Championships in front of her home crowd in Gothenburg. She won in a time of 12.59 seconds ahead of Kirsten Bolm and Derval O'Rourke.^[1]

Kallur retained her title at the 2007 European Indoor Championships in Birmingham. She finished only fourth in the 100 m hurdles at the 2007 World Championships held in Osaka, despite running a personal best of 12.51 s and having a clear lead to the final hurdle. The Swedish team had grounds for appeal, as eventual winner Michelle Perry had crossed over into Kallur's lane, possibly interfering. But by the time they did register an appeal, the time limit had elapsed.^[3][4] After the World Championships, Kallur won the three remaining Golden League events in Berlin, Zürich and Brussels, posting a personal best in the German capital and beating Perry in all three races.

World record and injuries

After posting several fast times throughout the beginning of the 2008 indoor season, Kallur broke the 60 m hurdles world indoor record with a time of 7.68 seconds at a meeting in Karlsruhe, Germany on 10 February. She was then the clear favourite for the World Indoor title in Valencia, Spain and won her heat in 7.87 seconds, but did not start the semi-finals, pulling out injured.

She fell at the first hurdle of her semi-final of the 100 m women's hurdles event at the 2008 Olympic Games in Beijing. She missed the entirety of the 2009 season through a stress fracture injury. She had surgery on her shin in late 2008 and, although she had a metal plate removed in June 2009, she declared herself unfit for the 2009 World Championships.^[5]

She briefly returned to competition in 2010 running a time of 12.78 s in New York City to finish seventh and coming fourth over 100 m hurdles in the first division of the European Cup. However, she was again sidelined from athletics in 2011. She had hoped to compete at the World Championships but did not recover from injury in time. She resumed training in August at a low-intensity, with the aim of competing in the Olympics in 2012.^[6]

In March 2017, she competed in European Indoor Championships held in Belgrade, Serbia.^[7] She reached the final in 60 m hurdles and finished eighth with a time of 8.14 seconds as her last match before retirement.^[8]