Arsenal captain Cesc Fabregas is "90 per cent" certain to travel to Barcelona for the hotly-anticipated UEFA Champions League match but Alex Song is out of the tie with a knee injury.
Former Barça youth player Fabregas has not played since injuring his hamstring in the victory over Stoke City almost two weeks ago and missed the Carling Cup final defeat to Birmingham City.
His recovery is going well, though, and he now looks likely to take his place at the Camp Nou, where Arsenal will be looking to secure their quarter-final place by protecting a 2-1 lead from the first leg.
"Fabregas will have a final test today," said Wenger this morning. "It is 90 per cent he will travel and be fit. It is vital for us because he is important in the transition between attacking and defending. He is also the leader of the team so we want him there."
Holding midfielder Song, who started the first leg between the sides at the Emirates Stadium, has not been so lucky but, as expected, Jack Wilshere has recovered from slight ankle discomfort.
"Alex Song is completely out. He had a test on Sunday morning and it was negative. Wilshere will be fit. Everybody else who played on Saturday should be available."
Robin van Persie has been added to Arsenal's squad too. Van Persie was substituted during Arsenal's Cup final defeat against Birmingham after suffering a knee injury while scoring the equaliser at Wembley.
The second leg was expected to come too soon for the Netherlands striker but he trained with his team-mates at London Colney today and Wenger has included him in a 19-man squad that will be cut to 18 ahead of the match.