Forward Joe Nuttall makes his Aberdeen debut as a substitute with midfielder Willo Flood making way.
Callum Paterson drags a shot wide of the Aberdeen goal.
Hearts take off goalscorer Abiola Dauda and send on Gavin Reilly.
Quarter of an hour to go.
Aberdeen replace defender Scott McKenna with forward Cammy Smith.
Dougie Kinnear: Anyone got Michael McGovern's phone number? This summer's top priority is a keeper! #bbcsportscot
Niall McGinn goes for goal but fires high into the stand. Frustrating for Aberdeen.
Hearts fancy a second. Juanma Delgado gets away on the left before centering for Abiola Duada but the forward cannot get there in time.
Hearts have the opening goal. Alim Ozturk's free-kick is saved by Adam Collin but Abiola Dauda pounces on the rebound from close range.Copyright: SNS
Aberdeen captain Ryan Jack is booked for fouling Callum Paterson.
Match has entered a bit of a lull after that flurry of chances.
Best effort of the night so far. Niall McGinn collects on the left edge of the Hearts box and attempts to bend a shot into the far corner only to see it drift wide.
Aberdeen take a free-kick short to Jonny Hayes, whose fierce effort is deflected out by the head of Perry Kitchen.
Just when it looks like Hearts are mounting a positive move, Callum Paterson gets his cross all wrong with the ball skewing off the outside of his boot and into the stand.
Much more urgency from both sides now. Aberdeen break on the left and Jonny Hayes' teasing centre is punched clear by goalkeeper Jack Hamilton under pressure from Kenny McLean.
Hearts then mount an attack and Abiola Dauda does well to hold off Ash Taylor but the eventual shot from a tight angle on the right is high and wide.
Jonny Hayes fires wide of the Hearts goal from the inside left channel.
A delightful drag-back and turn from Hearts captain Alim Ozturk ensures the defender retains possession under pressure from a clutch of Aberdeen players near halfway.
The Dons get the second half started.