Defending champions Bridgefield and 2014 winners Sedgefield will clash in the group stage after being drawn together for this year’s ASA National Age Group Water Polo U15 Championships.
With 14 teams entered for the 2016 event, only the winners of the four groups will progress to the semi-finals.
Liverpool-based Bridgefield stormed to their first national title last year, winning all five of their matches.
They beat two-time winners City of Manchester 7-4 in the semi-final before sealing the crown with a 2-1 defeat of Scottish side Caledonia.
But Sedgefield also come into the Championships on an unbeaten run, having swept aside all five opponents on the way to victory in 2014 then failed to field a side for last year’s U15 competition.
London-based Ealing and Grantham – who finished ninth and 11th respectively last year – make up the quartet in Group A.
Scottish side Caledonia to face newcomers Nottingham Leander
Caledonia will be seeded second and compete in Group D, the only other group with four teams.
The Scots will take on teams from Watford, City of Manchester B and Nottingham Leander, who are making their first appearance in the ASA National Age Group Water Polo U15 Championships.
Beckenham and Northampton are also making their debuts in the U15 competition and are drawn in Groups B and C respectively.
City of Manchester A are the seeded team in Group B, which also features Cheltenham. Meanwhile, having finished runners-up in 2014 and won bronze last year, City of Sheffield are seeded third and will take on Northampton and Chelmsford in Group C.
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