The local team, hosting the competition, could not start their national tournament campaign on a positive note. Despite a strong start in the first quarter, where they led 4-2, the team failed to maintain their advantage and lost the subsequent three quarters (3-0, 4-3, and 3-2), ultimately succumbing to a 12-9 defeat.

The opening day of the championship also saw other results, including Portugalete's victory over Pontevedra (15-12), a decisive win for Elche against Zaragoza (19-7), and Urbat Ike defeating Murcia (17-8).

Water Polo Algeciras will play the final two group stage matches this Friday. The first game is against Urbat Ike at 12:30 PM, followed by a match against Waterpolo Murcia at 8:10 PM. The quarter-finals and semi-finals will take place on Saturday, with Sunday reserved for the final and the third-place playoff.