Sir Alex Ferguson hopes to eclipse the achievements of Liverpool in European competition before the Manchester United manager brings down the curtain on his phenomenal career at Old Trafford.
Manchester United have won the Champions League twice under the stewardship of Ferguson, and three European Cups in total including the club's triumph in 1968, but are still languishing behind Liverpool in the competition's history.
Liverpool have triumphed five times in the European Cup, with the most recent final win coming in 2005, and only seven time champions AC Milan and nine time winners Real Madrid have been more successful than the Anfield club.
Ferguson, meanwhile, knows he could have matched Liverpool during his 26 years with the club having watched his Manchester United side twice lose in the final - each time to Barcelona, with the defeats coming in 2009 and 2011.
The Manchester United boss says he is 'frustrated' that the club has not won the Champions League more often during his tenure, but has the ambition of claiming the prize at least once more before he retires.
Ferguson has already knocked Liverpool 'off their perch' once when United surpassed the Reds' 18 English league titles, and now wants to do the same in Europe.
"I think in terms of history of our clubs, we should have one more and I want to win it again and get into the bracket of winners like Liverpool, our biggest rivals, Bayern Munich and Ajax," he said, as reported by The Mirror.
"I think AC Milan and Real Madrid have got separated from the rest of the bench, but that definitely drives me on a bit.
"I get really frustrated when I think about the opportunities we have had to win it, but you can't be greedy you look at my career and I have won two European Cups and Cup Winners' Cup and I am proud of that."
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