Nottingham Forest dealt a major blow to Manchester City's Champions League hopes with a 1-0 victory at the City Ground on Saturday.
Callum Hudson-Odoi struck in the 83rd minute to secure three points for Forest, cementing their remarkable third-place position in the Premier League table.
The result marks City's ninth league defeat this term.
Hudson-Odoi's decisive goal came from a brilliant piece of play as the winger collected a glorious diagonal pass from Morgan Gibbs-White.
He then ran into the box and beat City goalkeeper Ederson at his near post from a tight angle.
The victory keeps this season's surprise team Forest third on 51 points, with City in fourth place on 47.
Chelsea, just one point behind City, will go above the champions if they beat lowly Leicester on Sunday.
Fifth-placed Chelsea have a game in hand over Guardiola's struggling side.
Forest's rise is nothing short of remarkable under manager Nuno Espirito Santo, who returned to England after winning the Saudi Pro League with Al-Ittihad.
Just last season, Forest were deducted points for breaching financial rules and narrowly avoided relegation by six points.
Now the former European champions are closing in on a Champions League berth for the first time since 1980-81.
Pep Guardiola's City have endured a turbulent season, with their title defence unravelling spectacularly.
City's European hopes were already dashed after Real Madrid eliminated them in the Champions League playoffs.
Now it's a case of damage limitation for the former champions.
Chelsea now have a golden opportunity to leapfrog City in the standings.
Ederson was beaten at his near-post by Callum Hudson-Odoi
Reuters
The Stamford Bridge outfit will overtake Guardiola's men if they manage a victory against Leicester on Sunday.
Even finishing fifth could still be enough for City to reach Europe's elite club competition, depending on English clubs' continental results.
In a match of few clear-cut chances, City came closest when Nico Gonzalez's long-range effort scraped the outside of the post.
Hudson-Odoi nearly scored earlier, seeing his curled attempt pushed onto the post by Ederson.
Nottingham Forest stayed third in the Premier League
Reuters
Phil Foden had a goal-bound shot blocked by Nicolas Dominguez in another rare opportunity.
The result strengthens Forest's fairytale season as they continue their push for Champions League football.
For City, the prospect of missing out on the top four remains a real possibility.
With the business end of the season approaching, this match could prove decisive in determining both clubs' European destinies.
