Celtic’s European highs have often been associated with some truly dismal domestic hangovers over the past few years.
But Partick boss Alan Archibald says it’s his team’s own Resolve they will have to look at as they prepare for the season’s first Glasgow derby.
The Jags manager says that too much can be read into the Hoops’ recent tendency to come down with a crash after performing Champion’s League heroics.
Celtic beat Ajax 2-1 on Tuesday night and Thistle fans will be hoping for a repeat of previous occasions where the Scottish champions have fallen apart on domestic re-entry.
However, Archibald says his team must look to themselves ahead of Sunday’s sell-out televised match at Firhill.
He said: “I am sure Celtic will make changes and bring in a couple of players.
“I know they came unstuck after a few of their Champions League games last season, but I don’t think that will be a factor against us this weekend.
“They have not lost in the league this season, despite playing in European qualifiers and group games.
“You can see the difference in them this season. Every game they have played in after a Champions League match they have been quite strong.”
Partick beat high-flying Inverness Caley at the weekend and are confident of taking another top-table scalp.
Archibald, who hopes to have Scott Fox and Aaron Muirhead available on Sunday - despite the pair missing training on Tuesday.
Kick off is at 12.45pm.