Barcelona coach Luis Enrique has revealed he will wait until an hour before Saturday's mammoth El Clasico clash with Real Madrid before deciding whether Lionel Messi will start on his return from a two-month injury layoff.
Messi has been sidelined since damaging knee ligaments against Las Palmas on September 26, but is expected to feature at the Santiago Bernabeu after taking a full part in training this week.
"Messi's feelings since he re-joined the group have been positive and he is working at the rhythm of the group, but we still have to train today and then we will talk," Enrique said.
"It is evident he isn't 100 per cent physically, but, whether he plays or not, the great news is that he has recovered. We will decide if Leo plays an hour before the game."
Victory would take Barca six points clear of Madrid at the top of the La Liga table.
However, Enrique rejected claims his side could strike a decisive blow in the title race after just 12 games.
"For me this game will not be definitive for La Liga although it is very nice if you win at the home of your biggest rivals. It is the best scenario for a Barca player."
The match will be played under unprecedented security measures after a string of deadly attacks in Paris a week ago killed 130 people.
A total of 1,200 police officers will be deployed around the stadium, six times the usual number for a game classified as presenting a high security risk.
However, Enrique insisted he can only concentrate on the game and leave the job of ensuring the match passes off safely to the experts.
"What worries me is what is happening on a worldwide level," he added. "I concentrate on what happens on the field and the security is in the hands of the specialists."
Watch El Clasico - Real Madrid v Barcelona - live on Saturday, 5pm, Sky Sports 2 HD.