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."
|Kovac relieved by Bayern´s timely victory|
|Strasbourg 2 Monaco 1: Sy howler and Grandsir red card cost Henry in first match|
|Leicester City defender Chilwell signs new six-year contract|
|PSG´s Tuchel hopes Verratti and Di Maria can face Napoli|
|Liverpool star Salah had no fear during scoring drought|
|Alonso´s 2019 plans not damaged by McLaren´s IndyCar decision|
|Edinburgh outclass troubled Toulon, Wasps and Bath play out thrilling draw|
|Barca concern as Messi substituted with worrying arm injury|
|Howe: South coast derby draw a fair result|
|Our heads were in Manchester – Allegri left fuming at Juventus´ loss of focus|
|Derby County 2 Sheffield United 1: Marriott blunts Blades with 77th-minute winner|
|We have so many problems – Jokanovic alarmed by Fulham defensive woes|
|Huddersfield Town 0 Liverpool 1: Salah snaps winless streak|
|Pellegrini ruing injuries after Yarmolenko hurts ankle|
|Villarreal 1 Atletico Madrid 1: Simeone´s side denied LaLiga top spot|
|Gracia: Not easy to dominate Wolves like that|
|Isner´s Finals hopes hindered by Stockholm defeat|
|Dyche incredulous at refereeing decisions in Man City thrashing|
|Juventus 1 Genoa 1: Champions´ winning run ends despite record Ronaldo goal|
|´Fantastic´ Lamela urged to find consistency by Pochettino|
|You don´t want to lose any players - Young speaks out on Wade NFL speculation|
|Championship Review: Smith gets off to a winning start, Leeds beaten|
|Guardiola hails extraordinary Fernandinho after Burnley drubbing|
|Pochettino lauds Lloris as one of world´s best after West Ham heroics|
|Paris Saint-Germain 5 Amiens 0: Ten wins in a row for PSG as Neymar rests|
|Cristiano Ronaldo nets record 400th league goal|
|Marcelo backing beleaguered Lopetegui despite Madrid slump|
|Garcia dazzles to hit the front at shortened Valderrama Masters|
|Cardiff City 4 Fulham 2: Paterson gets Bluebirds off the mark|
|Newcastle United 0 Brighton and Hove Albion 1: Benitez´s men bottom after dismal defeat|
|West Ham 0 Tottenham 1: In-form Lamela settles London derby|
|Manchester City 5 Burnley 0: De Bruyne returns in comfortable win|
|Wolves 0 Watford 2: Capoue and Pereyra turn form book on its head|
|Bournemouth 0 Southampton 0: Howe´s side stifled by Saints|
|Prove you´re crazy about Inter - Spalletti rallies players ahead of Milan derby|
|Wolfsburg 1 Bayern Munich 3: Lewandowski leads Kovac out of trouble|
|Goerges betters Bencic to clinch Luxembourg title|
|Morgan wants more from ´rusty´ England despite series win|
|Sarri says sorry after touchline bust-up overshadows Chelsea´s late escape|
|Chelsea draw an ´awful´ result for excellent United, says Mourinho|
|The Chelsea assistant that angered Mourinho - Who is Marco Ianni?|
|Steve Kerr supports Colin Kaepernick: ´I think he deserves a chance to play´|
|Lopetegui ´more motivated than ever´ amid Real Madrid sack reports|
|That´s football – Rudiger shrugs off late Ianni-Mourinho fracas|
|AC Milan´s improved mentality could be difference against Inter - Gattuso|
|Emotional Kasatkina comes back from the brink to win Kremlin Cup|
|Forget it, it´s over - Mourinho accepts apology over touchline row|
|Mourinho in furious bust-up with Chelsea staff after late equaliser|
|Chelsea 2 Manchester United 2: Barkley strike denies Mourinho|
|Raptors star Kawhi Leonard: Too early for MVP chants|
|WTA Finals 2018: Profiling the ´elite eight´|
|Cipriani sent off and facing ban for high tackle|
|Real Madrid 1 Levante 2: Lopetegui on the brink as abysmal run continues|
|Warriors coach Kerr: Jerebko ´one of us´ after game-winning tip-in|
|Real Madrid break record for longest goalless run|
|England wrap up ODI series in Kandy rain|
|Melbourne Victory 1 Melbourne City 2: Honda scores but suffers losing start|
|Mata starts for United as Chelsea boss Sarri selects Morata|
|Dovizioso prepared for another Marquez duel|
|Isco returns as Bale makes the bench for Real Madrid|
|Maddison feeling at home with Puel´s Foxes|
|Ruthless Australia beat Tonga in historic Test|
|Pep talks helped Mendy make the most of his time out of action|
|Wantaway Butler revels in boos|
|Emery: Arsenal must be calm with returning Koscielny|
|Sevilla don´t fear Messi or Barca – Kjaer|
|Conte, Zidane and the AC Milan contenders clouding Gattuso´s future|
|Koepka in control in South Korea, on track to become world number one|
|Dovizioso grabs pole at Motegi, Marquez sixth|
|Langer backs Marsh for ODI squad|