She said the team presented the border negotiation process and the arbitration agreement, with emphasis on three parts of the land border.

"We presented our arguments and made counter-arguments to Croatian claims and the weak points in their presentation," she said.

The Slovenian presentation will continue Friday, when the most controversial bit of the border dispute, the sea border, will be on the agenda and Foreign Minister Karl Erjavec will attend the proceedings.

President Borut Pahor expressed the hope today that Erjavec and the team would "do an outstanding job...I'm convinced everything will work out well in the end."

Croatia presented its arguments Monday and Tuesday.

The hearings are held behind closed doors and both sides have so far revealed very little.

The arbitration tribunal said it would provide a summary of the hearings in mid-June.

The hearings in the Hague come after the two countries signed an arbitration agreement in November 2009 following years of failed attempts to resolve the border dispute. It entered into force in mid-2010.

A legally binding decision is expected within a year.