Zinedine Zidane has made it clear that his system of choice for big matches is 4-4-2.
Eden Hazard will partner Karim Benzema up front on such occasions when he returns from injury.
In midfield, Casemiro, Fede Valverde and Toni Kroos are certain starters, which leaves one spot up for grabs.
That last place in the starting line-up is being contested between Isco and Luka Modric so, who should it be?
The Spaniard returned to the side for Real Madrid's home game with Paris Saint-Germain in November and, after impressing on the night, has been a regular starter ever since.
In fact, he's started in each of Real Madrid's big matches since then - El Clasico, the two Supercopa de Espana outings and the Madrid derby.
Isco's recent form has been spectacular, showing exactly what he can bring to the table against Osasuna at El Sadar.
With his place in Spain's Euro 2020 squad at stake, this is a more focused and more determined Isco than we've been used to in recent years.
Zidane wants him to be more consistent over the course of the season but knows how important a player Isco is on the big occasions.
The former Malaga midfielder has played 20 games this season, starting 13 of them, but completing 90 minutes just once - he's often one of Zidane's first changes.
He's also scored two goals so far this campaign, both of them away from home. With him in the team, Los Blancos have won 14 out of 20, giving him a win percentage of 70 percent this season.
The Croatian's talent is beyond doubt, but he's not been an undisputed starter so far this season.
He made way in the starting 11 for Isco against PSG and in December's Clasico at the Camp Nou.
However, his resurgence in recent weeks has caused this major headache for Zidane, who sees the midfielder as a fundamental player for Real Madrid.
In a 4-3-3 formation, Modric would win out over Isco every time but, as an attacking midfielder, Zidane has his concerns.
Modric wins the battle in the goals department, having scored five times this season - his best tally since joining Real Madrid.
In all competitions this season, Modric has made 25 appearances and has been one the end of just one defeat.
With him in the team, Los Blancos have won 15 times, giving him a win percentage of 60 percent.
Kumbeklmoz
0
I prefer modric, MODRIC is a master in passes,
Kumbeklmoz
0
Modric is the best
ritishcr7
0
Thank yoouuuu😀
welcome 😁😁
Kucdepy
0
not conceding a goal in the entire match
Thank yoouuuu😀
ritishcr7
0
Someone who Can explain what a clean sheet is?
not conceding a goal in the entire match
lpsbl_10
3
isco is just holding the ball since modric proved himself already, i prefer modric 70 n 20 isco
FemiBalogun
6
with isco on the field we get more possession and control the game but we played slowly because of his excess dribbles and it's hard for us to score many goals. with modric on the field we played more faster on canter attacks and it's very easy for us to score goals because of his lancer passess and outside shoot,he contributed defensively more than isco,he dribble less but skillful,his problem is he can't play 90mins football again because of his age. I love them both and it's depends on our opponent and the formation our coach wants to play
Kucdepy
0
Someone who Can explain what a clean sheet is?
DarshanGuragai
1
I will chose isco because,he is well degerbing😲😲😲😲😱😱
DarshanGuragai
0
I will chose isco because,he is well degerbing
vicacmrty
2
Bro stiil modric is performing better than Isco. How long isco stayed without scoring while he plays close to the stricker. I will only favor Isco playing before modric only tough games. Against athetico when zidane make sub. He didn’t take out modric but he took out Isco Nd Kronos
Kyle2005
0
Best part is when they hold hands (in pic), so dilemma is sorted #ModricandIsco #lolfordilemma
Maverick00
0
Why
modric is old isco because we need to gather some cash for mbappe or others
Jepbinrtu
0
Isco
Jepbinrtu
0
sell both of them
Why
youngprof1
3
Isco is the best choice for this. Modric is getting to retirement age, let him be coming in by 2nd half.
youngprof1
1
hazard is not a player
Nah! He is a food vendor.
sokbckpsz
6
Where is Ascensio
Babushka
0
hazard is not a player
Is he a driver
BinayaKoirala
3
It should be Isco now because Modric is getting older and he lost possession so many times in a game and Isco has ability to open up the defense..
Peobkmtuz
5
Modric is better talented even with advancing age. Isico is good also, but he’s inconsistent and could slow down the game. I prefer Modric.
Maverick00
0
sell both of them
AlwaysCR7
2
Modric,and isco shine in the 2nd half
Soeadklsuy
0
you play my guy
Soeadklsuy
3
Good one
yieaioy
0
hazard is not a player
usco50
2
modric have more experience in the midfield while isco should be used as a forward.
Vuainstu
2
isco and Modric with Benzema and bale
Sozcdilz
2
Modric
Kumbeklmoz
2
Modric is the best, look at passes he pass,
AndreSancho7
1
Modric is 2 times better than Isco
SirMuddyAryan
5
When you talking about Modric off course you talking about best midfielder and you can't talk about midfielder without naming Modric because he is talented player who have mental and intelligence during the game so try to respect him and don't you provoke for him why he is important player in real. On other side Isco is important player who is mental and intelligence, but for now I think it will be good if this chance will to lsco. Zidane let Isco to start to play the game.
Rashnic/GOAT/CR7
1
Modric is a legend but he's old so use Isco
ashrazee
3
Go for Modric. He is the best for the position. Isco always return or pass the ball backward and that gives defenders nightmare!
GOAT-Seven
1
3 goals in 2018= 1 Ballon d'Or 5goals + 1 to be added = 2 Ballon d'Or loading for 2020[Crylaugh][Crylaugh]
edgarjones
1
Modric is old. Isco should maintain that role and grow more in confidence. He is a bigger treat than Modric.
cueabeir
2
Isco is till fresh and strong in attack but modric has become weak in attack
MumbaRk
1
isco and modric can come in the second half
Tahbmnpy
1
modric is a class player
Waoadiry
1
I prefer Isco to Modric
Waoadiry
1
I prefer Isco to modric.
Anthony Tiaka
2
I Zizou to start with Isco
Medipst
2
EDIEN HAZARD DEREALMADRID
DarkKing2010
5
Both of them make an amazing combination.
Yupakmnsu
2
Are u made zizou..? How can u compare isco with Modric😳 #LM10 for sure.. even if he is old but he’s still good
fohdlntuyz
3
Is o is great player