Celtic star Scott McDonald has revealed how Hoops goalkeeper Artur Boruc practises penalties at training. Just days after the amazing penalty shoot-out between Celtic and Dundee United in the Scottish Cup semi-final where Boruc stepped up to score, the Aussie striker said the Polish shot-stopper would often have a crack from the other side of the spot.

"Artur's penalty was good. He practises them in training. He usually gets Jan Vennegoor of Hesselink to be the keeper when he has a go so there's a big guy in goal," McDonald said after Wednesday's match .

"They were at it yesterday and took five each. I think it finished even between them.

"So the big man is confident when he goes up there to take one - and to put it in there as he did tonight is something special."

McDonald added that the shoot-out was his first in a match and the pressure that mounted was amazing.

"There is pressure when you go second. But ask the United boys about that. They were under pressure themselves," he said.

"Every time they scored we had to answer them. It's nerve-racking just watching it, never mind having to take a penalty. So I'm delighted to get through after all that.

"It was the first shoot-out of my career and I had to hit two penalties.

"We all have to step up and I've missed penalties before in games.

"We missed some early in the season but it looks like we've sorted that out now.

The Hoops now move through to the final against Rangers on March 15 and McDonald is charged for the match.

"Both teams' penalties were top quality. Finishing was tremendous under a lot of pressure. It's hard when it goes on that long because nobody deserves to lose. We are just grateful we got through. Now want to win the trophy.

"It's been a while since we've had an Old Firm final - six years I'm told - and that will be great for the players and fans. It's something to look forward to and it will be fantastic.

"I hope it's as good a spectacle - on a good pitch."