Celtic captain Scott Brown has urged his teammates to put their title celebrations to one side as they aim to finish the season with a double.
The Hoops clinched the Scottish Premier League championship in style last weekend as it routed Kilmarnock 6-0.
However, on Monday (AEST), Neil Lennon's side faces Hearts at Hampden for a place in the Scottish Cup final.
And the Celtic midfielder is keen to cap off a good season for the club by retaining the trophy it won last year against Motherwell.
"Everyone is still on a high but we have another big game coming up on Sunday," Brown said.
"We have got to focus and get ready for that, get back into training and being sharp. We have had a couple of good days and enjoyed it but that has passed now and we have a Scottish Cup game coming up."
The last time Celtic was at Hampden, it lost the League Cup final 1-0 to Kilmarnock.
And Scottish international Kris Commons is keen to use the semi-final against Hearts to make it up to the Celtic fans for the shock defeat.
"It's good to be champions but I want to get my mind back on preparing for the weekend," Commons said.
"We have a big game against Hearts so we have to make sure this good season becomes a great one by bringing the cup home as well."
Celtic will be without winger James Forrest and long-term injuries Beram Kayal and Daniel Majstorovic.
Hearts warmed up for the match with consecutive victories over Dunfermline and Aberdeen but winger Andy Driver says his teammates will need to be wary of a Celtic backlash.
"They've got a point to prove. It's a game they've got to try to wipe out of their memory," Driver said.
"They were throwing around the treble talk - they know now they've got to work to get it - nothing's going to come for free."
Scottish FA Cup
William Hill has extended its sponsorship of the Scottish Cup for a further two years.