Donegal made it three wins in three in Division 1 of the Allianz National Football League this evening.
Michael Murphy came off the bench to help them past 14-man Armagh by 0-21 to 1-10 in Ballybofey.
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Aidan Forker was sent off for a headbutt on Murphy in the second-half.
Earlier, Mayo picked up their first victory of the campaign.
Tyrone’s Aidan Clarke and Ryan O'Donoghue of Mayo. Photo: James Crombie/Inpho
They came from behind to beat Tyrone by 0-12 to 0-10 at Hastings Insurance McHale Park in a result that leaves Derry on the bottom of the table.
Elsewhere, Roscommon came out on top in the battle of the top two in Division 2.
They held on to beat Monaghan by 0-25 to 2-14 at Dr Hyde Park.
Meanwhile, Cavan returned to winning ways after beating Louth by 3-15 to 0-18.
