Aberdeen are closing in on Celtic but knows and they have to prove it when it matters.The Dons lost at Hampden for the fifth time against the all-conquering Hoops in Sunday's Scottish Cup semi-final.Hoban reckons the Pittodrie squad will come back stronger and get even better as a team, and he hopes by the end of the season they will have finally got over their Celtic hurdle.The defender said: “It's very tough.“They are a team who have a habit of winning over the last 10 years.“They win week-in