Mark Warburton believes that even a seven-goal thrashing of Celtic in their Scottish Cup semi-final will count for nothing if his Rangers side mess up in the league.
The Light Blues are 12 points clear of Falkirk at the top of the Championship having played a game less than the Bairns and steaming towards the title.
Since the cup draw on Sunday, a day after Rangers hammered Premiership side Dundee 4-0, attention has been on the Old Firm game at Hampden Park next month.
However, speaking ahead of the home clash with Morton tomorrow night, Warburton stressed his priority.
He said: "You could have a scenario whereby you could go into that semi-final and win by seven goals, but if you don't do your job in the league, you have had a shocking season.
"Our aims were not to win a cup final, our aim was the league and you can't lose focus."
Asked how close the two teams were, Warburton said: "Celtic are top of the league, have had European competition for years and have a squad full of internationals and we are respectful of that.
"We are not under any illusion about the quality of Celtic."