Celtic are confident they can score goals away from home

An own goal from Joos Valgaeren handed the visitors the lead in their semi-final first-leg tie before Henrik Larsson equalised.

Larsson later missed a penalty and Hartson spurned a number of good opportunities to put his side in front.

Boavista offered very little, but having already claimed the scalps of Malaga, Hertha Berlin and Paris St Germain on their Uefa run, Celtic know the away leg will be tough.

Match report: Celtic 1-1 Boavista

"We're still in this tie," man of the match Hartson told BBC TV.

"We drew at home with Liverpool and we finished the job away from home so there's no reason why we can't do that again.

"It will be difficult but we've got the players who can score away from home."

Celtic have scored in every game of their Uefa Cup run and have kept clean sheets in three of their away ties in the competition.

And manager Martin O'Neill was in upbeat mood after the match.

"We replied quickly after conceding a soft goal," O'Neill told BBC Radio Scotland.

All I know is that we have to score over there and I think we will Martin O'Neill Celtic manager

"I was pleased with the start we made and we were denied a couple of cast iron penalties," he continued with reference to two early handball incidents.

Larsson saw his spot kick saved in the 75th minute, but O'Neill was philosophical about the missed chance.

"That's what can happen in football," O'Neill grimaced. "It wasn't our night.

"After we'd drawn with Liverpool here there was an air of despondency in the dressing room and around the stadium.

"But we resolved that problem at Anfield and we can do it again, I'm sure.

"All I know is that we have to score over there and I think we will.

"We're still well in this game. There's no doubt about that."