Oliver McBurnie scored twice on his debut as Swansea City made light work of Peterborough in their EFL Cup second-round tie.
Having made 10 changes from Saturday’s 2-0 Premier League loss to Hull, the dominant Swans led 3-0 at half-time.
Jay Fulton headed them in front before 20-year-old striker McBurnie scored twice in two minutes.
Peterborough responded with Leonardo Da Silva Lopes’ long-range strike but the League One side could not recover.
It was a confident display from Swansea, whose winger Jefferson Montero tormented the hosts’ defenders.
He hit the bar with one early shot and provided the cross which led to Fulton’s opener – but it was McBurnie who impressed most.
The Scotland youth international curled in an excellent first goal before seizing on a rebound to round Peterborough keeper Mark Tyler and finish into an empty net.
Da Silva Lopes’ goal raised hope of a comeback for Peterborough, for whom Tom Nichols hit the post, but Swansea secured their passage to the third round.