Both these sides have been enjoying a rich vein of form and were on long unbeaten runs. Something had to give.
But it was Division 1 versus Division 3 and with the higher-status club, Chanel, at home, a home win was expected.
Chanel set out as if on a mission but had to wait until minute 32 for the lead goal.
Keith Kelly broke down the right and his low cross was met by Brian Minto who side-footed home from 10 yards.
George Radford in the Aiadan's net denied Phillip Byrne a second when he tipped over a header at pointblank range on 37.
On 55 the visitors almost levelled matters when Mark Dempsey's vicious inswinging free from the right just needed a touch but neither Mark Fay nor Larry Boyle could manage to get a boot on it.
Radford continued to keep his side in the competition with a string of fine saves.
Two acrobatic saves denied Keith Kelly on 52 and 60 and John Naughton was also denied by Radford on 62.
Aidan's threw Denis Menton forward for the final 15 and the big centre-back almost came up with the equaliser but his volley from close in was blocked away for a corner.
From that corner the same man looked like he was about to head home when Neil Ffrench appeared out of nowhere to deny him.
Chanel held out for the win making it 11 wins from a possible 12 for the Coolock Village outfit.