Inverness are the only team to have taken points off Celtic this season, and midfielder Liam Polworth is hoping they can go one better than September's 2-2 draw when the teams meet again in the Highlands on Wednesday.
Brendan Rodgers' runaway leaders have won 25 of their 26 Ladbrokes Premiership games so far this term, with their only dropped points coming at the Tulloch Caledonian Stadium when Alex Fisher headed in an 89th-minute leveller for the hosts.
Richie Foran's side climbed off the bottom of the table with a 2-1 home win over Rangers on Friday night, which followed an encouraging 1-1 draw with Hearts, and Polworth is now optimistic Caley Thistle can be the first side in the 2016/17 campaign to secure three points against the Hoops.
Read more: Erik Sviatchenko says Celtic never tire of winning football matches
"Two performances in a row and two results against big teams has got to give you a lot of confidence going into the next game," the 22-year-old said.
"To get our first win in what has been a long few months was great and to beat a team of Rangers' quality so well was enjoyable.
"We know obviously Wednesday will be a tough game.
"Nobody has beaten Celtic this season but I am sure they will have an off-day one day. Hopefully it will be on Wednesday.
"If you take anything against Celtic you are happy, especially on the form they are on, but I am sure someone will beat them this season."
Inverness suffered a 6-0 thrashing at Celtic Park before those two positive results against two top-six sides, but Polworth insists lessons were learned in Glasgow.
He said: "When you play Celtic you have to make sure that you keep hold of the ball for spells in the game and get yourself into it.
Read more: Erik Sviatchenko says Celtic never tire of winning football matches
"You try not to concede early and hopefully play into the game and keep that going.
"You might come away with something or you might only lose 1-0.
"On other days they will put five or six past you. You try your best but sometimes it doesn't work out.
"We are just trying to look forward and climb the table.
"Sooner or later we had to start picking up points, so hopefully this will be an upward curve for us and we will keep on climbing the table."
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