Aberdeen manager Craig Brown believes his side will prosper in the coming weeks, after running Celtic close in a 2-1 defeat in Glasgow.
Ryan Jack drew the visitors level with half-an-hour remaining before being sent off for a second booking.
And Brown felt that snuffed out his side's chances of victory.
"I thought we did enough to get something from the game, but credit to Celtic they made the most of the extra man when they had it," he said.
"Ryan will learn from that. He's one of the cleanest players we've got but he's been ordered off twice this season, so that's disappointing for him.
"When we got the equaliser I thought we could have gone on to win the game, but the ordering off didn't help us. It was a soft situation from an inexperienced young lad getting booked for celebrating then making a rash tackle."
Ki Sung-yueng gave the home side the lead in the 17th minute when he finished off a fine move but the home side failed to build on that and Jack levelled on the hour mark to unsettle the home support.
But with 18 minutes remaining, following a Ki free-kick, the former Aberdeen defender Charlie Mulgrew drove high into the net from close range to consign Brown's side to defeat.
The Pittodrie side were impressive in a 2-0 defeat at Ibrox in August, and the Aberdeen boss is hoping for better on their home turf against Rangers next week.
"That's twice we've been to Glasgow and lost by the odd goal. On both occasions I felt we deserved more," he told Sportsound.
"But we can't keep talking about hard luck stories, we've got to make sure that we defend ruggedly so that when we get on equal terms, as we did here, we don't lose the game.
"We've got a home fixture against Rangers next week and I think we can look forward to the next part of the season with a bit more optimism than in recent weeks."