In 2007, she won a silver medal at the European Athletics Junior Championships in Hengelo.

At the 2007 European Athletics Junior Championships in Hengelo, Klučinová finished second in the heptathlon with a points total of 5709.

At the 2009 World Championships in Athletics in Berlin, Klučinová placed 23rd overall in the heptathlon with 5505 points.

Klučinová equalled the 22-year-old national record in heptathlon with a points total of 6268 at the 2010 TNT – Fortuna Meeting in Kladno.

[1] Two years later, at the same meet, she was able to break the national record with a total of 6283 points.