A Seb Hines own goal late on in the match is all that separated the two teams.
Both sides sat back and waited for the other to make the running in what in truth was a low key opening 45 minutes. But the home side had almost got the game off to a sensational start within the first minute when Grant Leadbitter was denied by defender Chico Flores and then failed to make the most of the rebound.
Swansea’s trademark passing was in evidence several times in the first half but they failed to breach the defence of the Championship outfit.
The visitors did not have a lot of possession in the quarter-final encounter but they did look potent on the occasions they did have the ball. It is was no surprise when Swansea boss Michael Laudrup made the first change as Luke Moore came on up front in place of Itay Shechter.
The Premier League side began to gain the ascendency as the second half with progressed and they hit the post when Jonathan de Guzman’s curling free-kick hit the crossbar. The introduction of Swans midfielder Ki Sung-Yeung added to the dominance that the home side enjoyed.
In the last half an hour Tony Mowbray’s side began to show signs of fatigue as the Swans began to up the tempo. Swansea’s dominance was reflected in them forcing a number of corners and the reward for their pressure finally materialised after 81 minutes. The deadlock was broken when Boro defender Hines headed into his own net as he battled for the ball with Garry Monk.
To their credit Middlesbrough did not allow their heads to drop and made a concerted effort to grab an equaliser and in stoppage they could have sent the tie into extra-time. Ishmael Miller sent in a cross which went all the way through the Swansea box but there was no one to apply the finish for the visitors.
For Swansea the chance of collecting their first major trophy in the club’s 100-year history is one step closer. The Swans will face either Aston Villa, Bradford and either Chelsea or Leeds.