Spain and Greece booked their places into the International Swimming Federation (FINA) World Women's Junior Water Polo Championship final in Netanya in Israel.
Spain now have a grasp on the trophy they lifted for the first and only time in 2011.
In 2013 and 2015, they lost against the United States on both occasions.
Greece will be waiting for them in the final following a sweeping 13-8 win against Hungary.
Winning every quarter apart from a draw in the third, the Greeks never looked like losing the game.
Greece won the quarters 4-2, 3-1 and finally 2-1.
Likewise to Spain, Greece has won the tournament once before - a triumph over Australia in 1997.
Twenty years later, the country fell to the hands of Russia in its home tournament in Volos.
Greece has been difficult so far in the tournament, winning all three group games while scoring the most goals out of all 16 teams in the round-robin stage.
The pole position finish in Group A then propelled the team past the first knockout round and into the quarter-finals where they pummelled Serbia 18-5.
Spain have been something of a surprise package after finishing second in Group B.
This was followed up with an 18-2 humbling of Germany before taking a huge scalp in the form of Russia.
A 10-5 victory over the reigning champions set up the semi-final clash.
