Arsenal boss Arsene Wenger has labelled Sol Campbell's turnaround in fortunes this season "unbelievable".
The 35-year-old former England defender ended his first spell at Arsenal with a Champions League final goal against Barcelona in 2006, but was playing for Notts County away at Accrington Stanley in League Two earlier this season.
He re-signed for Arsenal in January, and even Wenger admits he is surprised by the change in Campbell's fortunes as he prepares his side to face Barcelona on Wednesday
"It is unbelievable," said Wenger. "He played at Notts County six months ago. That he can turn up and play against Barcelona is quite amazing."
Wenger will also hope to unleash a more powerful Cesc Fabregas against former club Barcelona. The 22-year-old Arsenal midfielder has smashed 18 goals in all competitions this season and is averaging one goal every two games.
If he hits the net three more times, the Catalan will have equalled his combined tally for past three campaigns.
Fabregas is hoping to shake off a knee injury to play against his former club but boss Wenger believes his scoring form has been the result of a calmness in front of goal and more physical power.
"I believe he is more relaxed," said Wenger. "There is less tension in his finishing. You feel that before he wanted to force the chance and now he is more relaxed.
"Also he has gained more physical power. You can see he resists much more the runs of his opponents and he is more powerful in his runs. These two ingredients make a big difference.
"Also I believe the change in formation has had an impact as well. He has more freedom to join in now."
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