The fact the Belgian goalkeeper had precious little to do in open play was an indictment of Swansea's lack of punch in the final third.
The former Manchester United full-back was as combative as ever but he had a lucky escape when he took his eye off Scott Sinclair and saw the winger blast an easy chance over before Sessegnon's opener.
He has been linked with a move to Arsenal to solve their left-back crisis yet he struggled with Nathan Dyer in the same way the Gunners did last weekend.
There were a few uneasy moments for the Irish international as he was dragged out of position on several occasions but you can't argue with a clean sheet.
He has re-discovered some of the authority that went missing during the latter days of Steve Bruce's spell as manager but is prone to the occasional lapse of concentration.
The Welshman kept things ticking over in the midfield trenches and used possession sensibly but often found himself chasing shadows.
If only he was half as effective in open play as he is at set-pieces then he would be some player and alas after a promising opening when he was denied by Vorm he faded and was lucky not to be sent off for a two-footed tackle on Scott Sinclair.
The combative midfielder looks twice the player he was during Steve Bruce's reign because he has learned the importance of keeping things simple and avoiding rash challenges.
The luck of the Irish was the rookie winger's strongest asset because on a day little went right for him a miscontrol allowed Sessegnon to put Sunderland ahead.
The Benin international is only 5ft 8in tall but the pocket-rocket's sumptuous goal showed that he was still head and shoulders above the Swansea defence and that was before he expertly teed up Gardner's crucial second goal.
The Dane lasted only 12 minutes before going off with a head injury as his loan spell from Arsenal went from bad to worse.
There was precious little he could do about Sessegnon or Gardner's goals and otherwise he was a bystander as his team-mates dominated.
He overcame a nasty clash of heads with Steven Caulker to hold the Swansea defence together with a composed performance.
Newcastle tried to sign the left-back last summer and he showed why he was in such demand with a tidy display.
He has held his own at right-back but should have given his side more in attack.
The Tottenham centre-back showed that he is one for the future with an efficient performance that showed he is Premier League calibre.
He called the shots in midfield with smart positional play and clever passing.
He showed he has an eye for a pass with some wonderful balls and helped keep Swansea on the front foot after his team went a goal behind but lacked a killer final pass.
Any more of this and an England call-up awaits because he continued where he finished against Arsenal by tormenting full-back Kieran Richardson.
The Icelandic international was the driving force for Swansea as he dominated the midfield exchanges with an industrious display and lung-busting forays forward.
He should hide behind the sofa when Match of the Day comes on his television because he missed an absolute sitter moments before Sessegnon struck.
There can be no faulting the Newcastle-supporting Geordie's work-rate but he needs to sharpen up his act in front of goal because he wasted one of his side's best openings by heading an excellent chance wide.
- 20 K. Westwood
- 4 M. Turner
Ahmed El Mohamady
He was sent on to invigorate Sunderland late on and did his bit with a lively cameo.
- 18 D. Meyler
His future looks uncertain following a bid for his services from Birmingham but there can be no doubting his eye for goal judging by his cracking long-range goal.
He says he wants to win a regular starting slot but words spoke louder than deeds and the teenager needs to up his work-rate if he is to dislodge Bendtner.
- 17 Dong-Won Ji
- 25 G. Tremmel
- 16 G. Monk
- 29 A. Richards
- 26 K. Agustien
The former Newacstle winger was thrown into the mix to use his pace to unhinge the Sunderland defence but he failed to get going.
He was sent on for his Swansea debut to find an equaliser but failed to make a notable impact.