Napoli coach Rafa Benitez said their erroneous showing against must not be repeated in their UEFA Champions League date with Arsenal.
The Stadio San Paolo outfit were kept to a 3-3 draw at home in their Serie A clash with Udinese, coughing up 2-0 and 3-2 leads to only take a point from the fixture.
Benitez's men require both a win over Arsenal in Naples, and hope Marseille halt Borussia Dortmund in France, to qualify for the Champions League knockout stages on Wednesday.
But the former Liverpool gaffer said they will not be doing so, should they commit errors such as they did on Saturday.
"We made two mistakes from set plays, including an own goal, and we are suffering because we make mistakes we should not be making," Benitez told Sky Sport Italia.
"This result means we still have to improve, as I've said many times. We should be in control of a match and then we make a mistake. We are the ones who make the errors and we have to do better.
"Of course we all expect Napoli to be at the level they were at early in the season and for the side to have more points by now. We cannot be satisfied with this and I am the first to be unhappy."
Benitez's men require more points than Dortmund in the final matchday of the group stages to reach the Champions League Round of 16, but he said defensively they will need to be sound against an in-form Arsenal side.
"Clearly it's a different competition and if we score goals the way we did today, then we have to do better when defending.
"Those two errors on the set plays really should not be happening and they changed everything.
"The way to beat Arsenal is to keep a tight team, have intensity, move the ball around and close the spaces."
Udinese boss Francesco Guidolin was delighted with the result, as his side - who entered the clash with 12 goals in 14 - put three past Benitez's Napoli, who he also wished well in the Champions League.
"I am satisfied for my players, as in my view in terms of mentality and approach we have been doing very well over the last month," Guidolin told Sky Sport Italia.
"It was a shame we conceded the 3-2 (deficit) when we had just equalised but it's also true the team kept its cool to get the 3-3 and a point we fully deserved.
"Our performance against Inter was the worst in my time here but before and after that we took the right approach, intensity and realised each point is precious this season.
"We are back where we belong, which is to fight for safety and not look ahead to Europe. We accepted that and the results are starting to come.
"I believe Napoli's attack, when working at speed, can cause problems for anyone and I hope they can qualify for the next round of the Champions League by beating Arsenal."
|Coach: Rafael Benítez|
|Rodwell hoping for more goals|
|Thauvin needs time to settle at Newcastle – Haidara|
|Kennedy takes blame for Celtic´s loss, stands by zonal marking|
|CONCACAF Champions League Review: Comunicaciones, Motagua off the mark|
|Rooney´s contribution undervalued - Schmeichel|
|Jedinak ruled out as Socceroos make changes|
|Sampdoria not a ´discount store´ - president Ferrero|
|Montolivo: No issue with Mihajlovic|
|Gilardino signs for Palermo|
|Chelsea target ´China´s Sergio Ramos´|
|Striker search like looking for love - Pochettino|
|Hecking ´sick´ of De Bruyne talk|
|Deschamps calls up Martial, leaves out Sakho|
|´The only thing they can is long balls´ - Midtjylland´s skipper slams Southampton|
|UEFA Europa League Review: Reus leads Dortmund rout, AZ complete late comeback|
|Messi should win Ballon d´Or - Bartomeu|
|Koeman rues refereeing decisions after Europa League defeat|
|Tottenham deal for Son not complete, say Leverkusen|
|Tuchel thrilled with aggressive Dortmund display|
|Midtjylland 1 Southampton 0 (2-1 agg): Premier League side crash out|
|Borussia Dortmund 7 Odd 2 (11-5 agg): Reus hat-trick highlights hammering|
|Cudicini tips Mourinho to avoid Porto upset|
|Anything is possible with Neymar´s future - Belletti|
|Burnley bring in Barton|
|Bayern Munich v Bayer Leverkusen: Vidal putting friendships on hold|
|De Bruyne edges closer to City move after further Wolfsburg talks|
|Real Madrid v Real Betis: Benzema back as Real look to hit the goal trail|
|Barcelona v Malaga: Rosales hopes for another upset|
|West Brom hit out at Tottenham´s Berahino pursuit|
|Stoke City v West Brom: Pulis set for Britannia return|
|Tottenham v Everton: Pochettino´s men eye first win|
|Everton reject Stones´ transfer request|
|Messi named UEFA Player of the Year|
|Pocehttino quiet on Berahino bids|
|Real Madrid to meet PSG in Champions League, Barca drawn with Leverkusen|
|Bournemouth v Leicester City: Howe eager to entertain|
|Ranieri coy on Gray link|
|Newcastle United v Arsenal: Wenger hopes for sharper shooting|
|PSG snap up Kurzawa from Monaco|
|Aston Villa v Sunderland: Sinclair aims to replicate cup form|
|Grabban a silly boy - Neil|
|Chelsea v Crystal Palace: Pardew braced to face stronger champions|
|Manchester City v Watford: Flores heads to Etihad with confidence|
|Marseille loan Real Madrid youngster Lucas Silva|
|Howe surprised by Harte´s retirement|
|Liverpool v West Ham: History counts for nothing, says Bilic|
|Bolasie set for Palace comeback|
|De Bruyne to City not a done deal - Allofs|
|Sevilla complete Llorente swoop|
|Wenger supports video technology|
|Milan v Empoli: Zapata sets sights on ´must-win´ fixture|
|Watford boss Flores ´not happy´ with transfer situation|
|Balotelli: I am no longer a kid|
|Bilic has no issue with Valencia|
|Arsenal ´not close´ to any late deals|
|Balotelli finalises return to Milan on loan|
|West Ham confirm Nolan departure|
|Thiago signs new Bayern deal|
|Schmidt saddened as Son nears exit|
|CONCACAF Champions League Review: Sounders lose in Honduras|
|Van Gaal considered early Herrera substitution|
|MLS Review: Fire stun Red Bulls|
|Carroll nears West Ham return|
|Rodriguez hoping for England recall|
|Leverkusen can challenge best - Schmidt|
|Ozil defends United recruit Schweinsteiger|
|Sporting ´better over two legs´ - Jesus|
|Stoilov revels in historic Astana triumph|
|Pioli: Lazio not ready for Champions League|
|UEFA Champions League Review: Rooney nets treble and Astana make history|
|Everton to reject Stones´ transfer request - Martinez|
|Barnsley 3 Everton 5 (aet): Delightful Deulofeu spares blushes for Martinez´s men|
|Van Gaal lauds Rooney character|
|Rooney delighted to be back in the goals|
|Club Brugge 0 Manchester United 4 (1-7 agg): Rooney ends goal drought with hat-trick|
|Juve striker Llorente undergoing Sevilla medical|
|Blanc confirms imminent Kurzawa switch to PSG|
|AFC Champions League Review: Lima gives Al Ahli the edge, Jeonbuk Motors and Gamba Osaka draw|
|Wanyama out of Euro tie with stomach infection|
|Digne joins Roma on loan from PSG|
|Monaco agree deal for Real´s Coentrao|
|Wolves reject third Norwich bid for Afobe|
|Valencia clarifies West Ham criticism of injury treatment|
|O´Neill hands duo Northern Ireland recalls|
|Illarramendi makes Sociedad return|
|Arsenal a player away from dominance - NBA star Deng|
|Godin ´always wanted´ Atletico stay|
|Schalke reject Roma´s Kolasinac bid|
|Injured Allen omitted from Wales squad|
|Bellerin ready for Debuchy battle|
|Valencia lashes out at West Ham treatment|
|Van Dijk hints at Celtic exit|
|Everton legend Gray resigned to Stones exit|
|Negredo: Suffering is in the past|
|Commons and Gordon reject Deila critcism after Celtic defeat|
|Neil remains defiant on Bournemouth target Grabban|
|Happy Milner optimistic about Liverpool chances|
|CONCACAF Champions League Review: DC United, Saprissa preserve perfect records|
|Tomkins eyes West Ham recall|
|Di Maria, Pastore out of Argentina squad|
|Schmidt unfazed by Lazio injuries|
|Pique hits back at Barca critics|
|Hurt Traore a ´marked man´ - Sherwood|
|Wolves reject second bid for Norwich target Afobe|
|Pardew fears ´long term´ Jedinak injury|
|Hughes thrilled with Bojan return|
|Maccabi´s Europe feat ´the high of highs´ for Ben Haim|
|McClaren expecting big things from Thauvin|
|Lucescu calls for Shakhtar improvement in group stage|
|Watford will learn from loss - Flores|
|Nuno revels in Valencia´s Champions League qualification|
|Advocaat unhappy despite win|
|League Cup Review: Preston claim Watford scalp, Luton lose shoot-out to Stoke|
|UEFA Champions League Review: Valencia make history for Spain, Celtic dumped out|