Ange Postecoglou clearly has a preferred strongest starting line-up; with the likes of Cameron Carter-Vickers and Carl Starfelt at the back, Callum McGregor and Reo Hatate in midfield, and Kyogo up top with Jota and Daizen Maeda on either side of him.

Source: https://www.glasgowtimes.co.uk/sport/23489657.postecoglou-kobayashi-iwata-oh-biding-time-celtic/?ref=rss

Bernardo shot just wide from 22 yards before Marshall denied Callum McGregor and Luis Palma hit the rebound wide.

Source: https://www.theguardian.com/football/2023/oct/28/hibernian-celtic-scottish-premiership-match-report

But when it came right down to it, it was Callum McGregor and who walked the walk.

Source: https://www.thenational.scot/sport/23348082.big-celtic-match-verdict-kyogo-double-sinks-rangers-hampden/?ref=rss

Callum McGregor was outstanding, and I got more of the energy and ambition that I want.

Source: https://www.scotsman.com/sport/football/hibs/livid-brendan-rodgers-slams-his-celtic-players-the-angriest-ive-ever-been-as-a-manager-4431873

Celtic skipper Callum McGregor and Man Utd’s Scott McTominay scored the goals last night as Scotland beat Georgia at Hampden Park.

Source: https://www.glasgowworld.com/sport/football/when-can-scotland-officially-qualify-for-euro-2024-finals-what-steve-clarkes-men-still-need-to-reach-germany-4190907

His dip in form has been strange given that the comeback of his skipper Callum McGregor from injury has allowed him to return to the advanced midfield role which he prefers and is better suited to.

Source: https://www-tmp.thenational.scot/sport/23235575.5-talking-points-celtic-surge-12-points-clear-rangers/?ref=rss

Skipper Callum McGregor and key Japanese duo Kyogo and Daizen Maeda have all jumped in at the deep end with long-term deals and it's widely expected more will be announced with the dawn of the league season upon us.

Source: https://www.dailyrecord.co.uk/sport/football/football-transfer-news/every-celtic-players-contract-expires-30586938

Then seconds later the visitors burst up the park as O'Riley hammered home a rebound from a Callum McGregor shot.

Source: https://www.dailyrecord.co.uk/ayrshire/kilmarnock-2-celtic-1-ayrshire-31640047

Usually so assured in seeing games out from winning positions, Celtic lacked composure with skipper Callum McGregor using a break in play to call for cool heads.

Source: https://www.dailymail.co.uk/sport/football/article-12402227/Aberdeen-1-3-Celtic-Liel-Abada-Kyogo-Furuhashi-Matt-ORiley-goals-ensure-reigning-champions-maintain-winning-start.html?ns_mchannel=rss&ns_campaign=1490&ito=1490