An appeal court has rejected more DNA testing in the case of Amanda Knox, who was convicted of murdering Meredith Kercher.

The American student’s appeal will only hear from one independent review, which was highly critical of the DNA evidence in the case.

Knox was convicted in December 2009 of sexually assaulting and murdering Coulsdon student Meredith Kercher, while they were studying in Perugia and sentenced to 26 years.

Raffaele Sollecito, an Italian who was Knox's boyfriend at the time, was sentenced to 25 years.

The ruling on Wednesday means Knox’s appeal hearing is due to end in late September or early October.