The veteran goalkeeper was rarely called upon between the sticks and he could do nothing to prevent Lamah's precise volley.
Excellent performance from the left-back who produced two well-weighted crosses to set up both goals. Was not afraid to attack and tested the opposition defence with several long-range efforts.
The Haitian international often struggled to cope with the intelligence of Hernandez's play and found himself exposed on numerous occasions.
Showed good movement and quick passing to outfox De Guzman in the midfield. Helped Petrolul to dominate the midfield battle.
Worked tirelessly alongside Boudjemaa in central midfield but clearly didn't have his shooting boots on as he spurned several presentable opportunities.
Was in charge of set pieces in the first half but struggled to effectively execute his passes, forcing Contra to replace him at the break.
The captain was cautioned for a nasty challenge on Britton but showed good reading of the play to break up the Swansea attack.
Caused Davies problems with his direct running down the right and showed excellent control to chest down Guilherme's diagonal ball before firing expertly past Tremmel for the opener.
Petrolul's most dangerous attacking threat with his clever runs behind the Swansea defence and out wide. Was unlucky to see his effort cleared off the line by Leon Britton but scored the winner with a neat glancing header.
The gangly Congolese striker struggled to make his mark on the game and was clumsy in possession. Unsurprisingly substituted by Contra at half time.
Produced a confident display in Vorm's absence and looked comfortable from crosses. Could do little to prevent either Petrolul goal and was let down by his defence.
A poor display from the young Spaniard who was found the wrong side of his marker on several occasions and relied on Flores to bail him out of trouble. Culpable for Younes' late winner.
An assured performance from the 26-year-old who showed an excellent reading of the play to accommodate for the mistakes of his defensive partner. Proved insurmountable in the air.
Looked a little rusty and clumsy at times and found it difficult to deal with the threat of Priso. However, he did get himself into some promising advanced positions and delivered some inviting balls from the left.
Produced a good cross for Lamah's equaliser although failed to hold the line for the Petrolul opener.
J. de Guzmán
Will be disappointed with his performance after failing to impress in the absence of Shelvey. Struggled to get on the ball and was anonymous in the midfield.
Continued his promising early season form with an impressive display down the right. His ability to find space and pick a pass will surely merit him a regular starting berth in Laudrup's lineup in the near future.
Was an effective shield in front of the back four, producing numerous important interceptions and a vital clearance off the line to prevent the Romanian side from taking the lead. However, his lack of discipline ensured he was dismissed late on.
His intelligence and trickery caused Alcenat problems all game although he did spurn two glorious opportunites to open the scoring for the Swans.
Showed his class with fantastic vision, close control and accurate passing. Due to sustained spells of Petrolul pressure, he was often forced to perform defensive duties which he did to good effect.
The 21-year-old Northern Irish striker was handed his first competitive start and his lack of experience showed as he often made the wrong choice in promising situations.
Gave the Romanian side an extra attacking dimension with his introduction from the bench. Almost made an instant impact when his fierce shot cannoned off the post.
Entered the field of play as a late sub but had little time to influence proceedings.
Introduced as a half time substitute and his constant running caused Swansea problems in the second half.
Came on as a late substitute to shore up the Swansea midfield.
The South Korean looked to give an extra dimension to the attack but struggled to give Laudrup's side a much-needed creativity.
Scored his first Swansea goal with a neat cushioned volley and gave more energy to a tiring midfield.