Mauricio Pochettino felt his Tottenham players deserved more from what he described as their best performance of the season in a dramatic 2-1 defeat at Inter.
With five minutes remaining at San Siro in their Champions League Group B opener, Spurs led thanks to Christian Eriksen's heavily deflected strike.
Pochettino's side looked in little danger of dropping two points, let alone all three, until Inter captain Mauro Icardi lashed in a superb 85th-minute volley and, in a stunning finale, Matias Vecino headed in from a corner in stoppage time.
The defeat was Spurs' third in succession - the first time they have endured such a run since Pochettino took over in 2014 - but the Argentine was not too disheartened by the overall display.
"I'm happy with the performance, we dominated but of course it's cruel the lesson at the end because the team deserves more. It was the team's best performance since the beginning of the season," he told BT Sport.
"We're so disappointed and annoyed because the players deserve more. In two actions we concede two goals. Until we concede the first goal the game was under control. After we conceded, everything can happen in a place like San Siro.
"Now it's so important to look forward and try to understand that is football and when you're in a negative period you have to bounce back."
Tottenham visit Brighton and Hove Albion in the Premier League on Saturday and Pochettino urged the importance of improving his side's defending at set-pieces, as well as their ability to see out matches after losing from a winning position for the second time in three games.
"It can happen in football, you can only fix that by working harder than before," he said. "We cannot say it's bad luck, we made some mistakes and sometimes you pay.
"We are suffering the punishment of our mistakes, that is football. Yes it happened at Watford, it's not 10 games it happened, but it's true in the last three games in two we were in winning positions and lose. We need to review and try to improve.
"It's so difficult to win, now in that negative period, the most important thing is to be calm and assess in the best way and understand why and help the team to bounce back again. The next game is another opportunity to win and stop that period of negativity."
|I wouldn´t swap Dembele for Neymar – Pires|
|Canelo ready to risk heavy weather against Fielding|
|Raptors upstage Warriors, Davis leads Pelicans with 44 points|
|India skipper Kohli excited by green Perth wicket|
|PSG? I haven´t decided my future yet – De Jong|
|Marcelo: Real Madrid don´t have attitude problem|
|India pair Ashwin, Rohit ruled out of second Test|
|Kovac: Ajax-Bayern draw was amazing|
|Sims re-signs with Dragons until 2022|
|Derrius Guice injury update: Redskins RB (knee) has rehab setback, undergoes 3 more procedures|
|Emery: Arsenal could sign defender in January|
|Phillies sign McCutchen to three-year deal|
|O´Neal thinks his Lakers teams could ´easily´ beat Warriors|
|A-League to add two clubs by 2020|
|Curry says he was ´obviously joking´ about moon landing comments|
|Now the beautiful part starts – Ronaldo ready for Champions League knockout stage|
|Bayern have a lot more potential – Lewandowski not satisfied despite top spot|
|Lyon star Fekir shares plaudits for Champions League progression|
|Mourinho not surprised by United´s defeat to Valencia|
|Motivation no issue for Benfica, claims Vitoria|
|Lewandowski finishes Champions League group stage as top scorer|
|Mourinho: We scored two goals and lost 2-1!|
|England have a diamond - Guardiola hails City´s Foden|
|Sterling´s carefree display invites us to love football more than others hate|
|Juventus achieved their objective, despite everything going wrong – Allegri|
|Never say never - Schmidt not ruling out All Blacks role|
|Bologna´s winning start ended in BCL|
|Di Francesco critical of Roma performance|
|Shakhtar Donetsk 1 Lyon 1: Fekir fires French side through in Group F|
|Benfica 1 AEK Athens 0: Grimaldo sends hosts out on a high|
|Young Boys 2 Juventus 1: Hoarau double seals famous victory|
|Manchester City 2 Hoffenheim 1: City through as group winners after Sane brace|
|Ajax 3 Bayern Munich 3: Kovac´s men clinch top spot in Amsterdam thriller|
|Valencia 2 Manchester United 1: Jones scores own goal as Red Devils limp through|
|Solari accepts responsibility for Madrid´s heaviest home defeat in Europe|
|WATCH: Rooney backs Rocky ahead of Canelo showdown|
|McLaren to collaborate with Team Bahrain Merida|
|Las Vegas to host 2020 NFL Draft|
|Stade teenager tragically dies after neck injury|
|Cahill may need to leave Chelsea if he wants to play, admits Sarri|
|Viktoria Plzen 2 Roma 1: Chory winner takes hosts into Europa League|
|Real Madrid 0 CSKA Moscow 3: Champions humiliated at Bernabeu|
|Sarri condemns ´disgusting´ Sterling abuse|
|Hansen hails outstanding Ben Smith ahead of Pau switch|
|Foden, Sterling start for Manchester City v Hoffenheim|
|Sky decision will not affect us in 2019, insist Froome and Thomas|
|Al Ain 3 Team Wellington 3 (aet, 4-3 on penalties): Shootout heartbreak for semi-pros in Club World|
|Jackson to remain Ravens´ starting QB despite Flacco return|
|Rams headline 2019 NFL International Series home teams|
|Rams headline International Series home teams for 2019|
|Atlanta want ´exciting football´ from new boss amid Bielsa links|
|Atlanta still yet to receive ´serious´ bid for ´Bale-like´ Almiron|
|Tottenham v Manchester United to be held at Wembley|
|Matip facing six weeks out with fractured collarbone|
|I´ve had quite a lot of calls – Brailsford encouraged by Team Sky interest|
|Afghanistan Football Federation president provisionally banned by FIFA|
|Knee injury rules Huddersfield´s Mooy out of Asian Cup|
|Arnautovic tipped for Man United move by Austria team-mate Sabitzer|
|Arsenal legend Adams to become RFL president|
|My love for football still burns strong – Toure speaks out amid talk of Premier League return|
|Noble contract extended to 2021|
|Split with Sky is an opportunity, says Brailsford|
|Van der Burgh rolls back the years, two more medals for Hosszu|
|Maitland-Niles praises Sterling for speaking out|
|Life is tough for him right now - Celtic striker Griffiths to take time away from football|
|Froome: Team Sky keen to continue with new partner|
|Emery confirms Koscielny to play against Qarabag|
|Llorente keen on Athletic return|
|I love the guy - Pocock backs under-pressure Cheika|
|Fit-again Ozil in line for Arsenal return against Qarabag|