Simone Inzaghi defended the "misunderstood" Romelu Lukaku celebrations after the Inter striker sparked late carnage at Juventus on Tuesday.
Loanee forward Lukaku restored parity with a 95th-minute penalty at Allianz Stadium, leaving Inter on level terms after a 1-1 Coppa Italia semi-final first-leg draw.
The Belgium international celebrated in front of Juve's Curva Nord, immediately prompting a confrontation with Juan Cuadrado that saw Lukaku receive his marching orders for a second yellow card.
Cuadrado, who scored the 83rd-minute opener, was then dismissed for a clash with Inter captain Samir Handanovic after the full-time whistle as tempers continued to boil over in Turin.
Inzaghi insisted Lukaku's reaction was understandable, though, as the Inter coach bemoaned losing his key forward and goalkeeper Handanovic to suspension.
Asked whether Lukaku's celebration was towards the crowd, Inzaghi told Mediaset: "Yes. This was clear, but it goes beyond this.
"I see a player who scores, celebrates, and everything happens there. Lukaku's celebration was misunderstood.
"It certainly wasn't a nice sight to see in a well-conducted and fair match until the 94th minute.
"[But] now I have to be clear-headed and think that for the return semi-final. Lukaku's celebration will deprive me of him and Handanovic."
Juve goalkeeper Mattia Perin was left far from impressed by what he deemed to be a disrespectful act by Lukaku, who appeared to shush a section of Bianconeri supporters behind the goal.
"We have to be the first to set an example, but in these games it's difficult to hold back," Perin told Sky Sport Italia.
"It's a lack of respect to celebrate under the Curva of the opposing team."
A hard-fought draw somewhat halted Inter's slide, having headed to Juve on the back of three straight Serie A defeats that have left the Nerazzurri's top-four place in doubt.
Inter are level on points with fifth-placed Roma and just six clear of Juve despite their 15-point deduction, but Inzaghi is buoyed by the support of the Nerazzurri faithful.
He said: "Our supporters are unique and incomparable. We lost a home game on Saturday, and up to the end, the Curva never left us.
"We are Inter, it's normal to expect different results. There was a call for everyone that we expect more and better. Tonight was a great response from players to the whole environment."
Celtic 3-1 RB Leipzig: Kuhn double inspires Hoops to Champions League fightback
Celtic's Nicolas Kuhn scored twice as the Bhoys fought back to clinch an impressive 3-1 victory over RB Leipzig in the Champions League on Tuesday.
Coming off a goalless draw at Atalanta on matchday three, Celtic recorded their second home win in the Champions League this season, moving up to 13th in the standings on seven points.
They had to do things the hard way, falling behind to Christoph Baumgartner's close-range header after a corner came off Cameron Carter-Vickers in the 23rd minute.
However, Kuhn levelled in the 35th minute with a superb curling effort from the edge of the box, then tapped into an open net for his brace shortly before half-time.
Benjamin Sesko and Baumgartner went close to equalising after the break but Celtic's birthday boy, 38-year-old goalkeeper Kasper Schmeichel, pulled off a couple of fine saves before Reo Hatate sealed victory with a close-range finish in the 72nd minute.
Leipzig's wait for a first point in the Champions League this campaign continues, with their chances of reaching the knockout stages fading after four defeats in as many games.
Data Debrief: Celtic flying high
Celtic may have been humiliated in a 7-1 defeat to Borussia Dortmund on matchday two, but that was a mere blip in what has so far been an impressive European campaign.
Their total of seven points is already their most in a Champions League campaign since 2012-13, when they collected 10, while they last netted more goals (currently nine) in a Champions League/European Cup campaign in 1977-78 (13).
Borussia Dortmund 1-0 Sturm Graz: Malen late show extends Champions League home record
Donyell Malen netted an 85th minute winner to hand Borussia Dortmund a narrow 1-0 victory over winless Sturm Graz in the Champions League on Tuesday.
A dominant showing from Nuri Sahin's side made it three wins from four games so far in the competition, moving them up to fourth in the new 36-team league.
Dortmund started brightly at the Westfalenstadion but were unable to find a breakthrough, with Marcel Sabitzer, Maximilian Beier and Serhou Guirassy going close.
They recorded 13 shots in the first half, their most in the opening 45 minutes of a Champions League match without scoring since Opta recorded this data (since 2003-04).
But Sturm Graz offered a threat on the break after the interval, with Jusuf Gazibegovic curling an effort narrowly wide before Mika Biereth missed a header from close range.
However, Dortmund left it late to seal the win as Malen pounced on Emanuel Aiwu's loose pass before being sent through by Guirassy, with the Dutchman rattling the ball beyond
Kjell Scherpen to seal another Champions League home win.
Data Debrief: Home comforts
While Sahin has come under fire for Dortmund's displays away from home, there is no arguing with his record at the Westfalenstadion.
He became the first Dortmund coach since the Bundesliga was founded to win each of his first seven home matches in charge (all competitions), while BVB are now unbeaten in 13 consecutive Champions League home games (W9 D4) - an extended club record.
Malen’s winner was timed at 84:56, Dortmund’s latest winning goal in a Champions League match since Kevin Groskreutz netted against Marseille in December 2013.
Lille 1-1 Juventus: French side's resistance broken after second-half penalty
Lille held firm to hold Juventus to a 1-1 draw at home on Tuesday in the Champions League, extending their unbeaten run to nine matches.
Jonathan David had fired the French club ahead in the first half, before Dusan Vlahovic scored a second-half penalty to level things up and leave both sides on seven points after four matches.
Things didn't start well for the home side, with Teun Koopmeiners thinking he had scored the opener for Juventus only for it to be disallowed for offside.
David put Lille ahead just three minutes later with their first chance of note in the match. The Canadian turned home to convert from a slick counter-attacking move.
Goalkeeper Lucas Chevalier had to be on form to keep the home side ahead before half-time, sensationally saving a Vlahovic half-volley 10 minutes before the break. Koopmeiners, meanwhile, had another effort chalked off in the 42nd minute.
Juventus upped the pressure in the second half, with Chevalier also upping things and pulling off two impressive saves in quick succession.
But ultimately, the Lille resistance was broken by a Vlahovic penalty on the hour after Francisco Conceicao had been fouled by Benjamin Andre.
The result leaves Juventus 10th and Lille 12th in the Champions League table.
Data debrief: Lille looking good for qualification
After drawing 1-1, Lille are unbeaten in nine matches in all competitions and three matches in the Champions League.
The French side had beaten Atletico Madrid and Real Madrid in back-to-back European games.
They now have a seven-point buffer between themselves and the bottom eight in the league table.
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