However, having had three managers in the space of a season in which they were bottom at halfway with only 12 points, it was understandable why the Swans so enjoyed taking a huge stride towards safety. And celebrate they did at the final whistle of a completely one-sided encounter they never looked like losing from the moment the familiar link-up between Sigurdsson and Llorente put them in front. Sigurdsson now has 13 assists for the season, while Llorente has 14 goals and has scored in each of the three victories Swansea have recorded during a timely unbeaten run of four matches. Also timely was full-back Naughton's first goal for the Swans in more than 60 appearances. His angled drive - set up by a neat pass from former Black Cats loan player Ki Sung-yueng - ensured there would be no late nerves.
It is now up to Hull to respond, otherwise Clement can lead his side into their final fixture at home to West Brom safe in the knowledge he will have a summer to prepare the Swans for a sixth successive top-flight campaign. Sunderland's defeat by Bournemouth two weeks ago confirmed the end of their 10-season stay in the Premier League. But two vastly contrasting displays since mean the Black Cats have provided a potentially decisive parting shot in the battle to avoid joining them in the Championship. At the KCOM Stadium last weekend, they showed enough in a 2-0 victory to give some hope that, with some strategic planning and rebuilding, they could bounce straight back to the top flight. But Saturday's heartless display, played out in front of a half-empty stadium that was almost devoid of home fans by full-time, laid bare just how much work they have to do. Any promotion effort next season looks unlikely to feature striker Jermain Defoe, who has scored 15 times this campaign but has a relegation release clause in his contract and appeared to be saying goodbye during a solo lap of the ground at full-time.
Manager David Moyes has suggested he will continue in his role, but the home fans aimed negative chants in his direction during this game. The Black Cats end their home campaign having earned just 14 points - the fewest in the division - and with a run of 10 games without victory, seven of which they failed to score in.