The first hearing in the dispute between Ukraine and the Russian Federation was held at the International Court of Justice (ICJ) in the Hague on 6th-9th March 2017. The hearing did not relate to the substance of the dispute, but to the request by Ukraine for provisional measures under Article 41 of the ICJ. Despite this, it might be useful to briefly summarize the case and consider Ukraine´s chances to succeed in it.
Link here.