The Swans went down to defeat in their first game after the international break at Preston North End.
Despite a good start it was the home side that took the lead just before the half-hour when Neil Mellor sent a header past Dorus de Vries from close-range.
The visitors did have chances to level and dominated large periods of possession but had two fantastic de Vries saves to thank for keeping the score at 1-0.
But a late Stephen Elliott strike was the final nail in the coffin on a disappointing afternoon for the Swans.
Paulo Sousa hands youngster Jazz Richards his full Swansea City debut at right-back this afternoon.
The Wales Under-21 international comes in to replace Matty Collins while regular full-back Angel Rangel sits out the second game of his suspension.
Lee Trundle starts in attack with the likes of Ferrie Bodde, Joe Allen and new recruit Cedric van der Gun all making the substitutes' bench.
Preston: Andy Lonergan (C), Richard Chaplow, Chris Brown, Darren Carter, Sean St Ledger, Liam Chilvers, Paul Parry (Veliche Schumulikoski, 69'), Billy Jones, Ross Wallace (Chris Sedgwick, 62'), Eddie Nolan, Neil Mellor (Stephen Elliott, 82').
Not Used: Michael Hart, Neill Collins, Wayne Henderson, Jon Parkin.
Swans: Dorus de Vries, Jazz Richards, Alan Tate(C), Ashley Williams, Marcos Painter (Gorka Pintado, 80'), Leon Britton, Jordi Lopez (Cedric van der Gun, 63'), Andrea Orlandi, Mark Gower, Nathan Dyer, Lee Trundle (Craig Beattie, 57').
Not Used: David Cornell, Fede Bessone, Ferrie Bodde, Joe Allen.
Attendance: 12,854 Away: 648
Ref: E L Ilderton (Tyne & Wear)
Jazz Richards warming up at Deepdale
The sun was beating down on the Deepdale surface on a warm day in Lancashire with the 500 or so visiting fans making themselves heard behind the goal.
Despite Andrea Orlandi opening up play in midfield his ball struggled to find Lee Trundle within 60 seconds of the first whistle.
Preston burst out of the blocks and on two minutes Ross Wallace's free-kick from the right had to be punched clear by Dorus de Vries while Chris Brown's fierce strike was blocked by Ashley Williams moments later.
There was a slight worry when Mark Gower went down injured but after a few minutes of treatment on the pitch and then on the sidelines he was okay to continue on the left-hand side.
Orlandi did create an opening for Lee Trundle 10 minutes in but the striker, making his second 'full' debut for the club, was flagged offside while Marcos Painter's low ball across the face of goal evaded players from both sides and trickled out for a Preston throw-in.
Jordi Lopez curled a 25-yards free-kick into the safe hands of Andy Lonergan and on the break Darren Carter found space before rifling his effort high over the top of de Vries' goal.
Former Sevilla man Lopez also showed great vision as he attempted to pick out Trundle with a low pass into the area on 16 minutes, Lonergan managed to reach the ball first on the edge of the area but as he spilled outside of the area himself the Lilywhites' skipper had to quickly clear.
The best chance of the game so far fell to the visitors two minutes later; after winning possession in midfield Orlandi spread the ball infield to Nathan Dyer, he in turn found Mark Gower on the edge of the area and as the winger closed down on goal his strike deflected off Lonergan and over for a corner.
But despite a positive start by Paulo's side it was Preston that would break the deadlock on 27 minutes - Chris Brown's overhead flick over two defenders picked out Neil Mellor and the former Liverpool striker sent a neat header across de Vries and into the net.
And it could have been a lot worse four minutes later when Richard Chaplow's free-kick found Sean St Ledger six-yards from goal but his header went over the top.
Dorus de Vries was forced into saving a Paul Parry effort as Preston started to dominate proceedings but Andrea Orlandi did come close with a 20-yard effort, fired just wide of the post, after starting the move by picking out Mark Gower from a quick free-kick.
And a tremendous move eight minutes before the break almost brought a Swans leveller - Jordi Lopez and Lee Trundle linking-up well in midfield before the ball found its way out to Gower, his deep cross picked out Nathan Dyer at the back post but from a tight angle saw his shot well saved by Lonergan.
With 90 seconds left on the watch Lonergan was forced into saving again, this time from Trundle who took the ball to feet inside the box, turned and forced a save from the 'keeper to win a corner.
Half-Time: Preston 1 Swans 0
No changes for either side at the break but the Swans started stronger and within two minutes of the re-start Trundle was unlucky to be flagged offside as he charged down on goal.
But moments later Ashley Williams became the first visiting player to go into referee Eddie Ilderton's book after kicking out against striker Chris Brown.
Preston had a glorious chance to extend their lead on 51 minutes with another header - former Wales international Paul Parry sent the ball into the box from the left and found the head of Brown, but his downward effort was tremendously saved by Dorus de Vries on the line and Jazz Richards cleared the loose ball.
Paulo made his first change of the afternoon just before the hour, a straight swap in attack, with Lee Trundle making way for Craig Beattie and within seconds of taking to the field the Scottish striker won his a free-kick midway inside the Preston half.
And it wasn't long before the Swans made their second change with Cedric van der Gun coming on to make his debut in place of Jordi Lopez.
Despite their best efforts the visitors still couldn't find a leveller, but on 66 minutes Nathan Dyer beat the offside only to fire high and wide, while substitute Craig Beattie saw a low drive deflect wide off the legs of Lonergan.
The first corner was cleared for another and from Orlandi's cross Alan Tate flashed a low header across the face of goal.
Dorus de Vries hadn't really been tested by the home side but when asked to step up he did deliver the goods.
And with a little over 15 minutes remaining he made his second fine save of the day - from another header - as Chris Sedgwick picked out Billy Jones who was thwarted by the Dutchman's fine acrobatics.
Paulo made his third and final change 10 minutes from the end, boosting his attack with the introduction of Gorka Pintado in place of Marcos Painter.
Luck just wasn't on the Swans' side as they continued to seek an equaliser, and after Ashley Williams had stopped Sedgwick with five minutes remaining he failed to stop the substitute minutes later and it led to a Preston second.
The midfielder skipped past the Welsh international, played the ball past Dorus de Vries and picked out fellow sub Stephen Elliott who bundled the ball into the corner of the net.
The same player almost added a third in injury-time but de Vries was at hand to palm away his effort, as well making another excellent save from Shumulikoski.
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