Gennaro Gattuso refused to blame Gianluigi Donnarumma for a late error that handed Inter a 1-0 win in the Milan derby.
The AC Milan goalkeeper misjudged a superb right-wing cross from Matias Vecino in the 92nd minute, allowing Mauro Icardi to head into an unguarded net.
Icardi also won the first derby of last season with a late penalty that completed a hat-trick, and the Inter captain has now scored five goals in his last four games against Milan.
But Gattuso refused to single out teenager Donnarumma for criticism, noting Vecino should have been prevented from delivering the cross in the first place.
"I don't want to pick on individuals," Gattuso told Sky Sport Italia.
"There were errors from everyone in defence, as Ignazio Abate went down too quickly to block the pass, [Mateo] Musacchio misread the cross too.
"We lost the game together, not because of Donnarumma. We lost because we didn't play with the right courage, we were distracted and conceded a naive goal."
Milan saw their eight-match unbeaten run in all competitions come to an end as their season-long wait for a Serie A clean sheet continued.
And Gattuso accepted the Rossoneri struggled to find a solution against Inter's high pressing tactics in Sunday's clash, with striker Gonzalo Higuain left isolated as a result.
"Inter certainly deserved more than us, but if this game had ended 0-0, there would have been some real positives," the coach continued.
"We played a style of physical football that we don't like to play, but we did it well enough. We could have passed better and done better on the counter.
"Since the start of the season my team hasn't really held out for 90 minutes, but this time we held out so well even with the many set pieces.
"The only regrets are that in the last 15 minutes we had so many counter-attacks and didn't make the most of them. Overall, it has to be said that Inter did more than us.
"Inter are physically stronger, we have other qualities. We tried to challenge them physically anyway and I really liked the approach, playing a type of football we are not accustomed to. We had our chances too, but undoubtedly Inter had more opportunities."
|Don´t worry bro – Mendy responds to Trump|
|Melvin, Snitker win manager of the year awards|
|Warriors´ Green suspended for Hawks clash|
|Asensio: It´s not for me to lead Madrid|
|Rooney ready to enjoy England farewell after pressure of ´Golden Generation´|
|Ludwigsburg stun high-flying Murcia in BCL|
|Rams v Chiefs moved to LA due to Mexico City field conditions|
|Skriniar discussing new Inter contract, confirms agent|
|Former Barcelona boss Martino named MLS Coach of the Year|
|Bell fails to report to Steelers, will sit out rest of season|
|Federer back on track after dismal Thiem display|
|Udinese appoint Nicola after sacking Velazquez|
|Monaco deny they broke rules regarding youth recruitment|
|Del Bosque, Zidane, Lopetegui - The former Castilla coaches Solari follows into Real Madrid hot seat|
|Ozil rejected ´crazy offers´ from Asia, reveals agent|
|Real Madrid appoint Solari on permanent basis|
|LeVert avoids need for surgery, should return this season|
|Neuer confident despite concerns over Bayern Munich form|
|All I ever wanted to do is win, says Sixers signing Butler|
|Pogba: Coming home to United was the best feeling ever|
|Watson among four signing new Bath deals|
|Susanna Dinnage to replace Scudamore as Premier League chief executive|
|Murray commits to Brighton until 2020|
|Rooney rejected chance of pre-World Cup farewell|
|Impressive Anderson thrashes Nishikori|
|Ozil´s Germany absence a ´pity´, says Sane|
|Rooney: I´ll finish my career in the US|
|McIlroy unsure of 2019 European Tour membership|
|Australian Open dismisses concerns of Federer scheduling bias|
|Hue Jackson joins Bengals staff as ´special assistant´|
|Real Madrid confirm Reguilon injury|
|Higuain handed two-match ban for Juve meltdown|
|Kruis ruled out for England as Jones calls up uncapped quartet|
|A year on from Italy failure, Ventura leaves Chievo after four games|
|Bairstow misses out as unchanged England promote Stokes|
|Recalled Alba denies Luis Enrique bust-up|
|´Unhappy´ Christensen won´t push for Chelsea exit|
|Nadal to make Abu Dhabi comeback in December|
|Taijul helps Bangladesh tighten their grip despite Taylor ton|
|Neymar joining Real Madrid wouldn´t hurt Iniesta|
|It´s just team spirit - Livingston not worried by Durant-Green exchange|
|Trippier out of England squad with groin injury|
|Ex-Sri Lanka international Lokuhettige charged by ICC|
|Former England and Chelsea star Joe Cole retires|
|Nets offer support to LeVert following serious leg injury|
|Panenka proud Sergio Ramos imitates his penalties|
|Liverpool´s Alisson seeks patience to reach potential|
|Anthony Davis leads Pelicans, Clippers hold off Warriors in OT|
|Lindelof rues international break for Man Utd|
|Shaqiri confident in more goals for Liverpool|
|Giants too good for 49ers in crunch time|
|Southgate named honorary Yorkshireman|
|Nicky Butt: Manchester United are low on confidence|
|Criticism of Barcelona star Dembele is overblown - agent|
|Thibodeau discusses Butler trade: We thought this was the best deal for us|
|Acuna, Ohtani win rookie of the year awards|
|LeBron James on Lakers’ early season struggles: ‘I almost cracked’|
|Welbeck has successful second operation on broken ankle|
|UEFA warns FFP cases can be reopened based on ´new information´|
|Foakes to keep England place for second Test|
|WATCH: Rooney looking sharp in England training return|
|Mbappe: Money in football is truly indecent|
|Djokovic back to brilliant best as Isner is beaten|
|Celta Vigo replace Mohamed with Cardoso after Real Madrid defeat|
|Joshua intrigued by Usyk, says Hearn|
|Ibrahimovic beats Rooney to MLS Newcomer award|
|Rams WR Kupp out for season with torn ACL|
|Sturridge denies ever gambling on football following FA charge|
|Koeman understands De Ligt´s Eredivisie frustrations|
|Jimmy Butler trade: 76ers acquire Timberwolves star in blockbuster deal|