Universitario were surprisingly beaten by UTC Cajamarca as Inti Gas moved clear atop the Primera Division table in Peru on the weekend.
Jose del Solar's Universitario conceded an 88th-minute goal as they lost 2-1 to UTC Cajamarca - previously winless - at the Estadio Heroes de San Ramon on Saturday.
Universitario were top of the standings heading into the round-six clash but find themselves in fifth spot on 11 points - two adrift of Inti Gas, who edged Union Comercio 1-0 on Friday.
Oscar Guerra was the hero for the visiting team, scoring six minutes before the half-time interval.
Universitario had enjoyed an unbeaten start to the season prior to Saturday's match - winning four of their opening five games.
But that record came to a halt after goals from Marcio Valverde and Manuel Corrales inspired UTC Cajamarca to their first win of the league campaign.
After a scoreless first half, the home team finally made the breakthrough courtesy of Valverde in the 63rd minute.
The Peruvian midfielder pounced on an attempted clearance, firing a volleyed effort from the edge of the box past goalkeeper Jose Carvallo, who was caught off his line.
UTC Cajamarca's joy was short-lived, however, as Raul Ruidiaz equalised six minutes later with a powerful header.
And just as both teams appeared set to share the points, Corrales sprung the offside trap to poke the ball beyond Carvallo two minutes from time.
In other results, Melgar are second in the table with 12 points - one behind Inti Gas - following a 1-1 draw at home to lowly Leon de Huanuco on Friday.
Juan Aurich and Cesar Vallejo are level on points with Universitario after both clubs drew.
Honours were even between 10-man Juan Aurich and Cienciano 1-1 on Sunday, while Cesar Vallejo played out a goalless draw at Alianza Lima on Saturday.
Real Garcilaso accounted for cellar-dwellers Los Caimanes 1-0.
Manuel Contreras levelled proceedings in the 63rd minute as second-bottom Sport Huancayo - trounced 6-0 by Juan Aurich last week - drew 1-1 with San Simon.
There were no goals scored in Universidad San Martin's trip to Sporting Cristal.
|Coach: J. Hernández|
for M. Valverde 66'
for V. Rojas 76'
for J. Sotil 83'
|O´Neill delighted with second-half display|
|First-half dominance pleases Deschamps|
|Muller criticises Germany profligacy|
|Euro 2016 Qualifying Review: Portugal go top, Gibraltar make history in defeat|
|Liverpool the only English club I could play for - Suarez|
|France 2 Denmark 0: Lacazette off the mark in routine victory|
|Republic of Ireland 1 Poland 1: Long rescues vital point|
|Portugal 2 Serbia 1: Coentrao puts hosts top of Group I|
|Strachan hails ´terrific´ Gibraltar|
|Lafferty back playing with a smile on his face - O´Neill|
|Toure to reveal Ivory Coast future over coming days|
|Georgia 0 Germany 2: Reus and Muller on target for world champions|
|Northern Ireland 2 Finland 1: Lafferty inspires fourth qualifying success|
|Scotland 6 Gibraltar 1: Casciaro´s historic moment outshone by Fletcher´s hat-trick|
|France 2-0 Denmark: Lacazette and Giroud on target|
|Firmino hopeful of Copa America spot|
|Hummels considering options at Dortmund|
|Suarez goalless on Anfield return, but Balotelli nets stunner|
|Casciaro scores first competitive goal for Gibraltar|
|Fleetwood Town 1 Preston North End 1: Ball stunner claims share of derby spoils|
|Italy v England: Judge me on results, says Conte|
|Colombia v Kuwait: Falcao seeking another strong showing|
|Brazil 1 Chile 0: Firmino settles scrappy affair|
|Luxembourg v Turkey: Let´s kick on, urges Terim|
|South Africa 1 Nigeria 1: Zungu strikes late to earn draw|
|Smalling wants long-term United stay|
|South Africa 1-1 Nigeria: Last-gasp Zungu goal cancels out Musa strike|
|Italy call up Santon and Abate for England friendly|
|Switzerland v United States: Klinsmann eyes learning curve|
|Netherlands v Spain: Hiddink has players´ support, says Wijnaldum|
|A-League Review: Sydney end Wellington run, Adelaide suffer injury blows in Jets win|
|Henderson eyes long-term Liverpool future|
|I have nothing to prove - Bale|
|Brazil 1-0 Chile: Firmino gives Selecao battling victory|
|South Korea v New Zealand: All Whites looking to future|
|Japan v Uzbekistan: Hosts eye another win under Halilhodzic|
|MLS Review: Kaka nets in Orlando draw|
|Mexico 1 Ecuador 0: Hernandez, Corona help Herrera´s men to victory|
|Deschamps calls for France response|
|Dunga unfazed by pressure|
|Montenegro fan turns himself in after flare incident|
|Injured Messi not ready - Martino|
|Hodgson: Rooney not close to Charlton|
|Terim proud of Turkey|
|Hiddink happy with point|
|Euro 2016 Qualifying Review: Netherlands and Italy stage late escapes|
|Debutant Eder delighted with Azzurri bow|
|Argentina 2 El Salvador 0: Mancuello nets debut goal in straightforward win|
|Kovac not satisfied despite Croatia victory|
|Netherlands 1 Turkey 1: Huntelaar spares Hiddink from historic home loss|
|Ghana 1 Senegal 2: Konate brace downs Black Stars|
|Bulgaria 2 Italy 2: Controversial debutant Eder rescues Conte´s men|
|Morocco 0 Uruguay 1: Cavani spot-kick seals win|
|Al Sadd say talks with Xavi ongoing|
|McClean slams Sunderland´s handling of poppy controversy|
|Ghana 1-2 Senegal: Black Stars continue Afcon hangover|
|Cheltenham player diagnosed with cancer|
|Palace takeover talk premature - Parish|
|Odegaard becomes Euro qualifiers´ youngest starter|
|Job not done yet, Bale warns Wales|
|Israel 0 Wales 3: Brilliant Bale bags brace as Wales go top|
|Dunga backs Neymar to overhaul Pele´s Brazil goal record|
|League Two Review: Hartlepool climb out of drop zone, Cheltenham go bottom|
|El Salvador 0-2 Argentina: Martino's men triumph without Messi|
|League One Review: Canavan leaves it late to deny County|
|Freddy Adu signs with 11th team in as many years|
|Besiktas deny Cech, Danny rumours|
|Puerto Rico v Canada: Haber targets more momentum|
|Miranda not contemplating Atletico exit|
|Austin relaxed over England prospects|
|Manchester United should sign Ibrahimovic - Schmeichel|
|Ibe eyes Liverpool run-in|
|Bertrand called up by England as withdrawal of four players confirmed|
|A-League Review: Risdon nets stunner, Germano tames Roar|
|Panama v Costa Rica: Unbeaten run a secondary concern for Wanchope|
|Italy coach Conte shaken after death threats - FIGC chief|
|Barca fears over Alba eased|
|Schweinsteiger to start Germany qualifier|
|Akinfeev thanks fans after flare incident|
|Injuries offer Kane chance of first England start|
|Russian Football Union to protest following Montenegro abandonment|
|October comeback the target for injured Foster|
|Van der Vaart looks set to leave Hamburg|
|Bale focused on Wales - Coleman|
|Kluivert helps Curacao to victory|
|Hamstrung Alba returns to Barcelona|
|Macedonia v Australia: Confident visitors eye victory|
|Akinfeev to return to Moscow with Russia squad|
|Brnovic: Montenegro have no chance of qualifying|
|Russia had to resume after Akinfeev incident - Capello|
|Terim: Robben absence important|
|Brazil - Chile Preview: Winning is 'our only option' - Dunga|
|France - Denmark Preview: Olsen hits out at 'disrespectful' hosts|
|Morata keen to keep working|
|Canada 1 Guatemala 0: Haber heads Floro´s men to win|
|Difficult to find a place for Kane in starting XI - Hodgson|
|Difficult to find a place for Kane in starting XI - Hodgson|