Ross County manager Derek Adams hailed his battlers after they pushed Dundee United all the way in a Victoria Park thriller which ended 2-1.[LNB] Adams was delighted with the display in the Co-operative Insurance Cup third round, as County lost 2-1 after extra-time against their top-flight opponents.[LNB]"I thought we were brilliant to start with and played exceptionally well," Adams said. "We created a number of opportunities, more in the first half than we have done all season. To take Dundee United so close was pleasing.[LNB]"But you are always disappointed when you haven't won the game."[LNB]The only complaint from Adams was over the penalty decision by referee Craig Thomson which gave United the opening goal in the 61st minute.[LNB]David Goodwillie won the penalty on the hour mark when he was adjudged to have been fouled by Paul Lawson, and converted it himself.[LNB]However, the County boss claimed there was a shove on Gary Miller by Goodwillie prior to the incident.[LNB]Adams said: "I've seen the replay for the penalty on TV. Unfortunately the referee doesn't see the foul on Gary Miller in the lead-up, so I'm disappointed from that point of view. You have to be 100 per cent sure about your decisions you are in that situation, you have to see it to give it."[LNB]He added: "It was a definite foul on Gary Miller so it should not have got to the next stage. It is very difficult when you are a referee and I think he has reacted to shouts and given the penalty kick.[LNB]"These things go against you, but I thought we were great. I thought we had a good chance to go through and unfortunately we didn't make it."[LNB]Iain Vigurs hit an 87th-minute equaliser but United grabbed victory after Scott Boyd scored an own goal after 101 minutes.[LNB]United manager Peter Houston said: "We knew before the game we would have to fight for everything.[LNB]"Some good teams have come up here over the last couple of years. I'm over the moon just now, the main thing for me was to get through."