The Bank of Scotland Premier League champions went down 1-0 in extra-time to AC Milan at the San Siro on Wednesday night in their last-16 clash.

Having held the Rossoneri to a goalless draw in normal time over two legs, Gordon Strachan's side conceded a Kaka goal to end their European adventure.

Midfielder Jarosik could not hide his disappointment after the Hoops had travelled to Italy with high hopes of progressing to the quarter-finals of the competition for the first time in their history.

"I realise that Milan had many goalscoring chances," he said.

"But we have to look at the penalty incidents and feel that we were hard done by.

"It is very hard to take to go out like that."

Milan did have plenty of clear-cut chances to break the deadlock in normal time but were denied by a great goalkeeping display from Artur Boruc.

Jarosik believes that if the referee had done his job properly, the outcome would have been different.

According to the Czech midfielder, Plautz failed to see Milan captain Paolo Maldini controlling the ball with his hand inside his own area, while, late in the second half, he waved to play on after Massimo Ambrosini had pushed Shunsuke Nakamura inside the area.

"I felt we should have had a penalty with the Maldini handball and there was the Nakamura incident," said Jarosik.

"The linesman should have helped the referee on the handball decision but he was an arrogant man, he didn't speak to us and he looked as if he wanted to help AC Milan more."

Jarosik nevertheless believes his team can take great comfort in this season's adventure in Europe.

Celtic, who are runaway leaders in the SPL, showed great determination by beating Manchester United at home in the group stages and holding six-time European champions Milan to a goaless draw at Parkhead a fortnight ago.

"I think we can look to next year now and be proud of what we have achieved," said the Czech midfielder.

"We must use this experience to get back to this stage."

Milan matchwinner Kaka admitted Celtic had proved a tough nut to crack, saying: "I am really happy with the contribution I have made to the team.

"It was a difficult game, really difficult and we are worn out.

"Celtic showed lots of maturity and tried to play their game but in the end we scored because we deserved it.

"I think overall we were the better side."