Rossi and Gimenez celebrate the early goal

Basel boss Christian Gross was understandably disappointed with the outcome of the match, but he too considered the tie to still be there for the taking.

"We had an excellent start and the first half was good," he said.

"With the loss of two experienced players, we lost a bit of control in midfield, but the approach was the right one for this game.

"Mentally, we have been ready to play Celtic in front of their home crowd, and also tactically, we played a good game.

"It's a heavy result, but it still gives us a chance. We have two goals to recover and I'm confident we can do it, but it will be very, very hard for us."