The Gunners' talismanic captain Cesc Fabregas has been cleared to make his Nou Camp debut in a competitive match.
According to the official website, Fabregas is set to pass a final fitness test before leading his team out to face the boyhood club that he left from at the age of 16.
The 23 year old Spaniard picked up a hamstring injury two weeks ago in the 1-0 home win against Stoke City; he has been ruled out for a few key fixtures since, most notably the Carling Cup final, where he was dearly missed.
Wenger announced on Monday morning that his skipper has been declared "90 percent" ready for the tie.
“Fabregas will have a final test today,” said Wenger, “It is 90 percent 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."
Elsewhere, the Gunners' midfield backbone Alex Song has been completely ruled out for the return leg. Song played majority of the first leg before being subbed off for hero of the night Andrey Arshavin, who is expected to start on the left wing.
There has been questions recently surrounding the fitness of the last member from the midfield trio, Jack Wilshere, but the rising starlet declared his fitness yesterday on Twitter:
"Afternoon everyone..just to let you know i am not injured and if selected will be fit to face Barca! Few kicks but nothing too bad."
The impressive youngster will be hoping to emulate his MoTD performances in recent weeks to propel Arsenal through.
Fabregas' return will provide a huge boost as his play-making abilities and leadership is vital if the North Londoners are to finish off and start what could be a significant chapter in their history book.