Fifth-placed Dolphin are currently three points behind Clontarf, who are fourth in the table. The top three - Cork Constitution, Shannon and Garryowen - have already booked their places in the play-offs.
A win for Dolphin on Sunday would move them ahead of 'Tarf in the standings and score a psychological blow for them ahead of the regulation phase's final round of matches on April 19, when Dolphin are away to Cork Con and 'Tarf entertain a struggling Galwegians side.
There is one outstanding match left in Division Three's regulation phase with a victory for Naas over Connemara on Saturday possibly moving them up to fifth in the final table.
Meanwhile, the semi-finals in Division Two and Three have been set for Saturday, April 12 and Sunday, April 13. The fixtures are listed below.
The Buccaneers v UCC game will take place on the Sunday as Buccs' home ground of Dubarry Park is playing hosts to the AIB Cup and AIB Junior Cup finals the previous day.
AIB LEAGUE FIXTURES:
Saturday, April 5 -
Division Three: Connemara v Naas, Monastery Field, 2.30pm
Sunday, April 6 -
Division One: St. Mary's College v Dolphin, Templeville Road, 2.30pm
Saturday, April 12 -
Division Two semi-final: Young Munster v Belfast Harlequins, Tom Clifford Park, 2.30pm
Division Three semi-final: Bruff v Banbridge, Kilballyowen Park, 2.30pm
Division Three semi-final: Instonians v Queen's University, Shaw's Bridge, 2.30pm
Sunday, April 13 -
Division Two semi-final: Buccaneers v UCC, Dubarry Park, 2.30pm
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