Monaghan showed the greater desire as they clinched their second victory of the Division One campaign against a disappointing Donegal at Letterkenny.
Donegal had led by two points when Michael Murphy fisted in their goal early in the second half.
But the Ulster champions failed to register a single point from play and Monaghan deserved their 0-9 to 1-7 win.
Monaghan lost their star forward Conor McManus, who got a first-half black card for bringing down Neil McGee.
But they finished the stronger and a string of frees by Paul Finlay and a long-range one by keeper Rory Beggan saw them hit the front.
Michael Murphy was wide with a chance to level the game before Monaghan made sure of victory when Finlay put Fintan Kelly in to score the final point.
Monaghan manager Malachy O'Rourke: "We were disappointed with the defeat by Mayo and were determined to put in a big performance.
"It came down to hunger and work-rate in the second half and when we got the chances we were able to convert them.
"It is a tight division - at the top and the bottom - and everybody is in the shake-up for everything."
Donegal scorers: P McBrearty (0-01f), M Murphy (1-03f).
Monaghan scorers: F Kelly (0-01), P Finlay (0-04f), D Malone (0-01), C McManus (0-01f), K Hughes (0-01).
Sunday 8 March
Football League Division One
Cork 3-17 2-9 Kerry
Derry 1-13 2-12 Mayo
Donegal 1-4 0-9 Monaghan
Down 1-17 1-16 Galway
Laois 2-17 0-16 Roscommon
Sligo 2-26 2-9 Louth
Wexford 1-16 2-12 Limerick
Antrim 1-12 1-8 London
Offaly 2-12 1-16 Leitrim
Longford 1-12 1-10 Waterford
Carlow 0-9 0-9 Wicklow