US coach Al Caravelli knows his team can compete with the best nations in the world - but only if they learn from their mistakes. The Americans followed up a run to the final of last week's Adelaide Sevens with their first appearance in the quarter-finals of the Cup competition here. And Caravelli is aiming to carry that form into the next round of the IRB Sevens Series in London as the US continue to improve their standings in the world. 'Last week was the first Cup final ever for us and the result was not what we wanted, but just to get there was important for our development,' he said. 'The players weren't satisfied and that's a good thing because it left them with a little hunger. 'This weekend, we've never been in the quarter-finals in Hong Kong so that was a real positive for us. Hopefully, we can build on this going into London.' To succeed in the longer term, however, Caravelli knows his team have work to do and having the opportunity to face off against the strongest sides has reinforced the lessons he has been trying to teach his players. The US lost to eventual winners Samoa in the quarter-finals of the Cup before succumbing to an Australia in the Plate semi-finals. Australia went on to lift the Plate. Both games gave Caravelli and his players the opportunity to see up close the difference between teams who can win and those of who lose. 'Just like in our game against Samoa, against Australia we conceded four tries and three of them were from our mistakes,' he said. 'I told the players that, at this level, when you make the top eight what separates you is those fine decisions,' Caravelli added. Participating in more tournaments and reaching the knockout stages on a regular basis, he believes, will change all of that.