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."
|Manchester United fined for late arrival and delayed kick-off against Valencia|
|Australia-Pakistan chat not ´especially polite´ - Sarfraz|
|Pogba relishing ´pressure game´ against in-form Hazard|
|Don´t bet on Cardiff survival, warns Warnock|
|Buffon enjoying Tuchel´s methods at PSG|
|RIP to Wimbledon epics! Isner feels like The Undertaker following final-set tie-break rule|
|Sevilla performance sealed Bernat´s Bayern exit - Hoeness|
|Keita set to miss out as Liverpool monitor injured stars|
|He didn´t want to be here – Guardiola doubts Sancho will return to Manchester City|
|Sarri: Manchester United are the best in the Premier League|
|Mourinho salutes ´brave´ Shaw for ´best possible´ response to criticism|
|No Ballon d´Or distractions for Griezmann, insists Simeone|
|Wigan stand by Hardaker as full-back prepares to undergo rehabilitation|
|Barcelona deny Neymar talk|
|Hazard can win the Ballon d´Or as a Chelsea player, insists Sarri|
|De Bruyne in contention to start in Manchester City´s clash with Burnley|
|Neymar needs to mature to reach Messi levels - Xavi|
|We have a hell of a lot to do - Paine slams Australia batting|
|Kerber and Osaka to meet at WTA Finals|
|Lorenzo out of Japanese MotoGP|
|Real Madrid handed Africa trip in Copa del Rey|
|Allegri: Ronaldo has sharpened Juventus focus|
|No Wade in Wasps squad amid NFL reports|
|Rooney: Five of us controlled Man United dressing room|
|Bayern bosses launch scathing attack on ´disrespectful´ media|
|Saints lock in Lawes to new deal|
|Adelaide United 1 Sydney 1: Debutant Le Fondre rescues a point|
|Madrid can´t look back, only forward - Lopetegui confident of revival|
|Wimbledon to introduce final-set tie-breaks|
|Abbas inspires Pakistan to series victory|
|Madrid boss Lopetegui hopeful on Bale availability|
|Mood is positive at Bayern, insists under-pressure Kovac|
|LeBron offers food for thought after losing Lakers debut|
|Bolt future not an immediate concern for Mariners|
|Hazard: I could finish my career at Chelsea|
|Buffon hoping to avoid Champions League final against Juventus|
|Wilshere not ready for West Ham return|
|Chelsea v Manchester United: Hazard better under Sarri than he ever was with Mourinho|
|The big Friday Premier League quiz|
|Khawaja suffers meniscal tear, doubt for India series|
|Babbel: Klopp must win trophies now at Liverpool|
|LeBron makes spectacular start on Lakers debut, but LA fall to Trail Blazers|
|Broncos thrash Cardinals to end losing streak|
|Price leads Red Sox past Astros and into World Series|
|LeBron makes fast start on Lakers debut with two massive dunks|
|Real Salt Lake 4 New England Revolution 1: Hosts boost play-off chances|
|Simmons gets triple-double in win over Bulls|
|´Ambitious´ Maguire wants Champions League football|
|Henry praises ´charismatic leader´ Falcao|
|WATCH: Cardinals WR Fitzgerald tackles former QB Warner on sidelines|
|Spurs right not to make signings – Pochettino|
|Icardi happy at Inter, close to contract renewal|
|This Week in U.S. Sports: Bosa leaves Ohio State while the World Series is almost set|
|Liverpool boost as Salah and Van Dijk join training|
|Cowboys discuss road woes, Prescott says team ´addressed the elephant in the room´|
|Isner scrapes through in Stockholm, Monfils eliminates Tsonga|
|Hinch says Altuve would be out with injury in regular season|
|WATCH: Schwarzenegger tells LeBron to make Lakers great again|
|LeBron tells Lakers coach Walton: I´m always fresh!|
|Mayweather should come back to fight me - Alvarez|
|Goerges battles past Vekic, Kasatkina wins all-Russian tie|
|Ask 32,000 Gibraltarians if the Nations League is meaningless - Styche|
|They´re going to speak about it for years - Azhar reflects on comical run out|
|Garcia in the mix as weather hits Andalucia Valderrama Masters|
|From lacking a ´football brain´ to signing a new contract – the Mourinho-Shaw saga|
|Alonso teases Indy 500 return as Hamilton reveals NASCAR temptation|
|Guptill ruled out of Black Caps´ UAE tour|
|UEFA investigating PSG-Red Star fan clashes|
|Just ´another weekend´ for champion-elect Hamilton|
|G League will offer $125K to top prospects in lieu of NCAA one-and-done route|