Anthony Gordon struck the decisive blow as Newcastle United secured a memorable 1-0 triumph over Chelsea at Stamford Bridge on Saturday evening, ending a lengthy drought at the west London ground.
The England winger found the net in the 18th minute, watched by national team manager Thomas Tuchel from the stands.
It marked the Magpies' first victory at this venue since 2012, when Papiss Cisse famously stunned the Blues.
Home supporters made their displeasure known at the final whistle, jeering their players off the pitch following consecutive defeats at Stamford Bridge in both domestic and European competition.
Newcastle claimed a vital win over Chelsea that could have serious repercussions for their season
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The hosts had dominated the opening exchanges, with Wesley Fofana squandering a free header before Cole Palmer, Enzo Fernandez and Alejandro Garnacho all fashioned opportunities.
Yet Newcastle struck against the run of play through a moment of defensive vulnerability.
Tino Livramento, making his first appearance since January following a hamstring problem, drove forward from defence with three Chelsea players in pursuit.
The former Blues academy product then threaded a precise ball through to Joe Willock, who evaded the offside trap.
Willock's run created the opening for Gordon to slot home from close range, punishing a collective lapse in concentration from the home side.
Chelsea were frustrated throughout their contest against Newcastle
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Chelsea's goalkeeping situation remained unsettled, with Rob Sanchez recalled for the fourth change between the posts in five matches.
The Spaniard produced a fine stop to deny Jacob Ramsey before half-time.
Liam Rosenior introduced striker Liam Delap at the interval, but the substitute could not find the breakthrough despite testing Aaron Ramsdale.
Reece James, who had committed his future to the club with a six-year contract extension just 24 hours earlier, rattled the woodwork with a late free-kick.
Joao Pedro headed onto the roof of the net in the dying moments as Chelsea's frustrations mounted.
The home faithful booed once more as their Champions League aspirations suffered another setback.
Newcastle's victory lifted them to ninth position in the Premier League table, boosting their late push for European qualification.
Chelsea boss Liam Rosenior has come under serious pressure this week
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Chelsea remain in fifth place, though Liverpool hold a game in hand ahead of their Sunday fixture against Tottenham.
The Blues face a daunting task on Tuesday when they host Paris Saint-Germain in the Champions League last-16 second leg, trailing 5-2 from the first encounter.
A trip to Everton follows next Saturday.
Eddie Howe's side travel to Barcelona on Wednesday for their own European assignment, having drawn 1-1 at St James' Park in the first leg.
They then welcome local rivals Sunderland the following Sunday.