Udinese coach Francesco Guidolin believes Arsenal remain favourites for their Champions League qualifier.

The Friulani lost 1-0 at the Emirates, but hit the woodwork with Antonio Di Natale and had numerous scoring opportunities, so qualification is wide open for next Wednesday's decider.

"The second leg will be even tougher, because we have to score and maintain our balance, knowing we cannot leave space at the back for opponents who can hurt us with their pace," said the Coach.

"We have to do everything well and have a little bit of luck on top of that."