Diego Simeone emphasised the importance of Diego Costa ahead of the Atletico Madrid striker's potential return against Borussia Dortmund in the Champions League.
Costa has been sidelined with a hamstring injury but the Spain international is in the squad for Wednesday's Group A trip to in-form Bundesliga side Dortmund.
The 30-year-old has struggled for form this season, the former Chelsea star is yet to score in LaLiga, though he did find the net in Atletico's 2-1 triumph over Monaco in Europe.
Simeone, however, praised Costa as he told reporters: "Diego Costa always give us physical and moral strength.
"He is a very important player for the character he transmits to the team, and his potential as a football player.
"He didn't play the last days, and we'll see if he is in the first 11 or not. He trained very well [on Monday], and he showed enthusiasm.
"When he is enthusiastic, it makes the fans, his team-mates, and the technical staff happy."
Dortmund and Atletico are the runaway leaders in Group A with two wins from as many matches - Club Brugge and Monaco yet to register a point.
Dortmund are also top of the table in Germany thanks to the goals of Paco Alcacer, who has scored eight times in all competitions since arriving from LaLiga champions Barcelona.
"Regarding his football, we are not surprised," Simeone added. "He is a decisive player, close to the area, short moves that make the full-backs find him to finish the game.
"And confidence is something so important for a player. Paco just found continuity and he has answered with something he did in the teams where he has that situation."
|Alexander-Arnold embodies Liverpool spirit - Klopp|
|Stoinis shoots Stars to Melbourne derby victory|
|A-League Review: Glory held in stalemate as Sydney close the gap|
|DeMarcus Cousins ´felt like a kid on Christmas´ in Warriors debut|
|Alexander-Arnold signs long-term contract at Liverpool|
|Pochettino eyes Messi-esque role for Alli|
|Halep sets up mouth-watering Serena showdown by conquering Venus|
|Wilder-Fury II expected for April 27 or May - Warren|
|Celtics´ Kyrie Irving on technical: If someone questions your manhood, you got no choice|
|Serena would ´love´ Halep clash|
|Djokovic sees off Shapovalov at Aus Open|
|DeMarcus Cousins scores 14 points in Warriors debut|
|´Don´t cry, you did really well´ - Serena consoles Yastremska|
|Andrade eyes Golovkin after defending middleweight title|
|WATCH: Cousins throws down thunderous dunk to open Warriors career|
|Serena sails into Australian Open last 16|
|Icardi will renew Inter contract - Nara|
|Mickelson maintains Desert Classic lead|
|Klopp dismisses Coutinho rumours|
|Osaka completes stunning comeback in Melbourne|
|Lakers guard Rondo cleared for full-contact practices|
|Solskjaer: Lukaku is big part of Man United squad|
|Napoli slam FIGC decision to reject Koulibaly appeal|
|We´re the hunters! - Kovac´s Bayern ready to chase down Dortmund|
|Chiefs safety Reid expected to play against Patriots|
|Chelsea not ready to rest Jorginho - Sarri|
|NFL receiver Fitzgerald has hole-in-one in round of golf with former president Obama|
|I´m really loving playing this game - Eagles QB Foles not ready to retire|
|Saints show no mercy, score 111 in rout of Timisoara Saracens|
|CAF Champions League Review: Khenissi double gets ES Tunis up and running|
|Edinburgh clinch home quarter-final, Glasgow also advance to last eight|
|Hazlewood to miss Sri Lanka Tests with back injury|
|Norwich City 3 Birmingham City 1: Canaries end winless run to go second|
|Hoffenheim 1 Bayern Munich 3: Goretzka goals close gap on Bundesliga´s return|
|Cowboys part ways with offensive coordinator Linehan|
|Payton´s message to Saints fans: Hurry up and make noise|
|Transfer talk no distraction for Inter, says Spalletti|
|Memories of 2015 still linger for Vunipola as England begin World Cup year|
|De Bruin´s 85th-minute try consigns Kings to eighth straight loss|
|Bielsa´s Derby County dossier detail ´pretty standard´ – OptaPro chief|
|Injury-hit Madrid lose Navas to adductor issue|
|Patriots coach Belichick still gets nervous ´every week´|
|Copa del Rey draw: Barcelona to meet Sevilla in quarter-finals|
|Kohli: No one more committed to India than Dhoni|
|Brook questions Khan credibility following Crawford agreement|
|Sad Pochettino admits Bielsa is ´wrong´|
|Simeone eyes LaLiga gain after Atletico´s Copa del Rey pain|
|Rossi a no-go for Tottenham as Pochettino rules out panic buys|
|Guardiola identifies ´three or four´ midfield targets|
|Nadal encourages patience in young stars after humbling De Minaur|
|NFL playoffs 2019: 10 Opta facts for Patriots v Chiefs|
|Robertson helping Klopp learn Scottish for Dalglish chats|
|Levante appeal over alleged ineligible Barcelona player rejected|
|NFL Playoffs 2019: 10 Opta facts for Rams v Saints|
|Lowry to take three-shot Abu Dhabi lead into final round|
|Training is not for anyone else - Klopp condemns Bielsa over ´spygate´ row|
|In other countries, everybody does it - Guardiola respect remains for spying Bielsa|
|Cilic battles back to join Nadal, Federer in fourth round|
|Klopp: Trent unbelievable for playing through pain|
|Faulkner provides super start and fabulous finish to sink Scorchers|
|Ref admits error in key foul call on Lonzo Ball in Lakers-Thunder game|
|Marina Granovskaia is working very hard – Sarri ´confident´ of January signings|
|Tuchel confirms Rabiot out of PSG contention|
|Madrid derby kick-off confirmed for February 9|
|Benzema fit to face Sevilla despite broken finger, Solari confirms|
|Bournemouth boss Howe says no offers received for Wilson|
|Kerber cruises after Wozniacki, Sabalenka upsets|
|Mbappe a great player and great person, says beaming Beckham|
|Gracia confident someone will step up if Doucoure leaves for PSG|
|Albrighton signs new Leicester deal|