Sofiane Boufal's majestic solo goal five minutes from time spared Southampton from more home frustration as they saw off West Brom 1-0 at St Mary's.
The Morocco international came off the bench to slalom past several defenders and slide home in the 85th minute, one of few moments of quality in a tight Premier League tussle on Saturday.
Saints boss Mauricio Pellegrino admitted ahead of the match that his players are susceptible to anxiety at home and their nerves threatened to spill over after an encouraging first half failed to generate a goal.
Former Southampton striker Jay Rodriguez spurned a gilt-edged chance to punish his former side and Dusan Tadic was also culpable of wasting a good opening for the hosts after half-time.
But Boufal, who had only been on the pitch for four minutes, finally discovered the required quality to earn his side a first win in four Premier League matches.
West Brom, who lost Jonny Evans to an early shoulder injury, are now winless in seven league fixtures, with little respite to come at home next weekend as Tony Pulis' men host leaders Manchester City.
Veteran midfielder Gareth Barry fired wide with the first attempt from either side when his shot from distance brushed the side-netting of Fraser Forster's goal.
The opening exchanges were otherwise predictably cagey until Ryan Bertrand's curling free-kick clipped the outside of the right post, the ball aided on its way by a marginal deflection off Evans' head.
Southampton took that as their cue to increase the tempo, Tadic drawing a comfortable save from Ben Foster, before Oriol Romeu directed a bouncing corner around the upright with a hurried shot on the turn.
And the hosts should have made it 1-0 when, after appeals for handball against Virgil van Dijk were waved away at one end, Manolo Gabbiadini raced to the other and saw Shane Long poke his low pass the wrong side of the near post.
Pellegrino's side were given more encouragement on the half-hour as a heavy fall forced Evans off with a shoulder injury, although Foster's smart save from a Maya Yoshida header meant they were unable to take advantage before half-time.
0 - Five of the last nine Premier League games between Southampton and West Brom have been goalless at half-time. Drab.— OptaJoe (@OptaJoe) October 21, 2017
The primary creator in the first half, Gabbiadini looked to take the responsibility of scoring upon himself by twice trying his luck within five minutes of the restart.
West Brom soon issued a reminder of their threat on the counter-attack when Rodriguez broke a high line and went clean through for a one-on-one, but the striker inexplicably screwed his finish wide.
Serbia international Tadic should also have done better when confronted with a good opportunity in the other penalty area, the forward taking too long over his finish and allowing Foster to smother.
But the mounting tension at St Mary's was finally relieved late in normal time as substitute Boufal conjured up the necessary magic to give Southampton just their second home victory of the campaign.
Key Opta stats:
- West Brom are without a win in their last seven Premier League games (D4 L3), and have enjoyed just two victories in their last 18 in the competition.
- Saints have scored just six goals in their last 11 Premier League home games.
- Of Premier League fixtures played at least 15 times, games between these two sides have averaged just 1.47 goals per game (22 goals in 15 games), fewer than any other clash.
- The Baggies have posted a league-low 37 per cent possession figure in the Premier League this season.
- Southampton have kept a clean sheet in seven of their last nine Premier League meetings with West Brom.
- Boufal's goal was his first in his last 23 Premier League appearances, since netting against Middlesbrough in December 2016.
- Five of the last nine Premier League meetings between these two sides have been goalless at half-time.
21. Mai 2018
|If you Googled ´European nights´, Liverpool would be top result - Klopp|
|BREAKING NEWS: Icardi cut from Argentina World Cup squad|
|Test recall a ´fantastic surprise´ for Buttler|
|Klopp needs Premier League to be a Liverpool great – Johnston|
|Salah is ´definitely´ world´s best - Lovren|
|Rhinos captain Watkins ruled out for eight months|
|No clue - Klopp defiant over Can to Juventus claims|
|Younis tips Babar for Pakistan greatness|
|Germany squad numbers hint at World Cup good news for Neuer|
|WATCH: Moto3 rider makes spectacular jump over crashed rival|
|Leaving out Morata ´painful´ for Spain boss Lopetegui|
|Gustard to leave England role for Harlequins|
|Nainggolan retires from Belgium duty after World Cup snub|
|Spain striker Morata misses out on World Cup selection|
|LeBron or Kawhi could lead Lakers to the Finals - World Peace|
|Serena steps up Roland Garros training ahead of French Open|
|Nainggolan left out of Belgium´s World Cup squad|
|The long goodbye: Iniesta sits alone in Camp Nou after final Barcelona match|
|Wane to leave Warriors at end of season|
|Dr Fury will see you now - Tyson plans future career in medicine|
|Harden, D´Antoni rue ´soft´ Rockets performance in Warriors drubbing|
|Liverpool players can change their lives in Kiev, says Gerrard|
|Real Madrid v Liverpool: Can great deeds of the past fuel the bid for Champions League glory?|
|Wash your mouth out! - Curry´s expletive outburst earns scolding from mother|
|Rakitic lost for words as Iniesta heads for Barcelona exit|
|Conte: Chelsea must overhaul squad to change style|
|Johnston: Liverpool can´t lose Suarez, Coutinho and Salah!|
|Messi: I like Griezmann, he´s one of the best|
|Ohtani says he´s not good enough for Home Run Derby yet|
|Mendy: France are eyeing World Cup glory|
|Scott accepts two-week ban for Walker punch|
|Braves rally for six runs in the ninth to defeat Marlins|
|MLS Review: Red Bulls upstage Atlanta thanks to Wright-Phillips brace|
|Warriors breeze past Rockets in game three|
|We have a quality squad – Man City chairman hints at caution in transfer market|
|Wise cruises to maiden PGA Tour victory at Byron Nelson|
|Matic: United can fight for Premier League and Champions League with experience|
|Golden Knights GM on Stanley Cup Finals berth: I don´t know how we did it|
|I did a ´s*** job´ defending LeBron James – Morris|
|Dembele suffers sprained right ankle|
|We know Fellaini´s not going to renew with United – Mirabelli suggests Milan move|
|Cavs´ Lue not satisfied with just one win|
|They even whistled at Torres – Simeone backs Griezmann|
|I arrived as a boy, I leave as a man – Iniesta in emotional Barcelona farewell|
|Lingard: Wembley loss my worst feeling in football|
|Cahill: Conte uncertainty affecting Chelsea|
|Sarri has run out of time – Napoli chief De Laurentiis|
|Barca boss Valverde salutes departing Iniesta|
|I feel like I´ve been run over by a truck or had 15 pints - Crutchlow|
|Four sent off as Ajaccio win chaotic Le Havre play-off on penalties|
20. Mai 2018
|Sweden win shoot-out to retain world title|
|De Vrij penalty was destiny for Inter - Icardi|
|PSG? Maybe one day - Pogba coy over long-term future at Manchester United|
|Messi wins fifth European Golden Shoe|
|Gattuso calls for more malice at Milan|
|Barcelona 1 Real Sociedad 0: Coutinho stunner lights up Iniesta´s farewell|
|Lazio 2 Inter 3: Spalletti´s men seal Champions League qualification with stunning comeback|
|Royals reach play-offs as Kings XI come up short|
|Nadal sees clearly after Rome rain is gone|
|Double whammy for Zverevs as Mischa bows out in Geneva|
|Atletico Madrid pay fitting tribute to tearful Torres|
|Hull FC claim derby spoils, Dragons off the bottom|
|Buzarnescu battles through as McHale impresses in Nuremberg|
|Neymar an artist who will not need special treatment - new PSG coach Tuchel|
|Atletico Madrid 2 Eibar 2: Torres bows out with a double|
|Napoli 2 Crotone 1: Milik and Callejon condemn visitors to the drop|
|Iniesta starts on Barcelona goodbye but Messi rested|
|Nadal rallies after rain break to dethrone Zverev in Rome|
|AC Milan 5 Fiorentina 1: Cutrone brace secures Europa League group stage spot|
|I think I made a fantastic decision - Garoppolo key to Sherman joining 49ers|