Swans beaten but still advance
Swansea suffered a disappointing 2-1 defeat in Romania but still advanced to the group stages of the Europa League at the expense of Petrolul Ploiesti.
The Welsh club had held a 5-1 lead after their handsome win in the first leg of this play-off tie last week.
The hosts never looked capable of turning the contest on its head but they did take the lead on the night through Njongo Priso's 73rd minute strike.
Substitute Roland Lamah responded instantly, but Hamza Younes headed home the winner for the hosts before Swansea captain Leon Britton was sent off late on.
Michael Laudrup's side can at least look forward to at least another six games in their European adventure, and they will find out their opponents when the group stage draw is made on Friday.
But the Dane will have been concerned with several aspects of this sluggish performance.
As with the previous round against Malmo, Swansea were nowhere near as effective as they had been on home soil, and it is an issue that will need to be rectified if they are to advance beyond the group stage.
After labouring for much of the game, Swansea fell behind on the night with 17 minutes to play.
The Swans' back four attempted to play Priso offside, but Angel Rangel kept the Cameroonian onside and he easily beat Gerhard Tremmel.
Swansea hit back just a minute later. Alejandro Pozuelo found Lamah unmarked and in acres of space, and the winger finished superbly to claim his first goal for the club.
But Hamza then glanced home a header to restore the lead and Swansea ended the game with 10 men as Britton was shown a second yellow card in the dying minutes which means the midfielder will miss their next game in the competition.
With progression virtually assured Laudrup had elected not to risk the fitness of captain Ashley Williams, record signing Wilfried Bony and midfielder Jonjo Shelvey with Sunday's Premier League trip to West Brom in mind.
The Swansea boss sprung a surprise by handing a first start to striker Rory Donnelly, whose only previous first-team appearance had been in last season's Capital One Cup win at Crawley.
From the off Swansea were uncharacteristically sloppy in possession, allowing their opponents to enjoy long spells in their half although they did not trouble Tremmel.
Indeed, the German's main problem was the use of a laser pen by Petrolul's fans whenever the hosts had a set-piece near the Swansea goal.
Donnelly was showing some nice touches but will feel he should have done better with two first-half chances.
The Northern Irishman dragged wide from Michu's delightful pass, and then could not beat Geraldo Alves as he bore down on goal.
But Petrolul should have led just before the interval.
Ferebory Dore's header from a corner fell to Hamza, his shot was only half stopped by Tremmel and Britton had to head off the line
Tremmel had more work to do early in the second half as he pushed a fierce drive from substitute Filipe Teixeira round the post.
As the hosts pressed further forward in search of the goals they desperately needed, they left space for Swansea to exploit and they were nearly punished when Donnelly raced clear, the striker tried to find Pablo Hernandez and Alves diverted the pass against his own post.
But, just as Swansea established some control, they conceded.
Priso got the better of Swansea's offside trap to stroll forward unopposed and beat the helpless Tremmel.
Lamah coolly finished from Pozuelo's cross just moments later, but Hamza's header during a frenzied final few minutes gave the home side the win and Swansea's night ended on another low when Britton was giving his marching orders after kicking the ball away following a foul by Chico Flores.