Dumbarton’s legs finally gave against Premiership side Kilmarnock, losing 3-0 in their final BetFred Cup game at Rugby Park on Saturday.

The sides went in even at the break, after Dougie Hill looked to have put his header over the line, but the referee waved play on.

Killie went through the gears in the second half, with Chris Burke, Kris Boyd and Lee Erwin scoring for the hosts in clinical fashion.

The Sons were already out of the competition after their midweek draw with Annan, and made two changes to the side.

Christian Nade’s suspension meant Mark Stewart played up top, with Ally Roy dropping to the bench with new signing Danny Handling starting and Tom Walsh returning from injury.

The home side had the first meaningful chance of the game, Burke’s long range shot on 11 minutes looked destined for the top corner, but Scott Gallacher pulled off a fingertip save to deny the former Rangers winger.

Johnston and Handling combined well to give Sons their first chance of the game, but Handling’s through ball was slightly overhit, the ball trickling through to the Killie goalkeeper.

Handling’s played through Stewart, but the former Raith striker’s shot was blocked by MacDonald on 28 minutes.

But Dumbarton should have been in front shortly after.

Johnston’s corner was headed in by Hill, MacDonald saving the ball from behind the line, but the referee and his assistant ruled the ball had not crossed the line.

In the second half Kilmarnock were the stronger team, and began to tear Dumbarton apart.

Boyd won the ball back from Smith on the left, the ball was eventually crossed in and Burke’s header powered past Gallacher to open the scoring for Lee McCulloch’s side after 53 minutes.

Roy was introduced after 61 minutes and almost had an immediate impact for the Sons.

The Hearts loanee cut inside, dribbling past two defenders before his shot was palmed away by the goalkeeper.

But substitute Lee Erwin capped off a fine afternoon for Killie, clipping home his debut strike off the post after Boyd had helped on a Jordan Jones cross.

In injury time David Wilson was denied by the post.

David Wilson went close late on for the visitors, his header bouncing off the bar late on.

DUMBARTON: Gallacher, Smith, Dowie, Hill, McLaughlin, Johnston 6 (Gallagher, 76), Hutton, Wilson, Walsh (Prior, 83), Handling (Roy, 61), Stewart.

Subs not used: Ewings