Celtic could be without one of their key players for the Old Firm amid an injury scare, with Mika Baur missing training on Friday.
The German is coming off his best game for the Hoops so far, dominating the midfield during Wednesday night's narrow win over St Johnstone. Baur scored the winner, but the goal was only one small highlight on a night that saw him haul his side to victory.
Celtic were a long way from their best, but busy Baur gave them enough initiative to get over the line, and the Bhoys protected their 100% record in the league.
Next up is a cup quarter-final with Rangers, and Celtic will be hoping to advance to the last four and continue their fine form, but it will be a tricky test against a Gers side that has won their last four, especially playing at Ibrox with no away fans to stir them on.
Ahead of that game, Baur has missed training, and we will find out later on Friday why, but for now, there is concern that he will not be available for the Old Firm. If that's the case, who will replace the German? Here are the options.
Alex Oxlade-Chamberlain
By far the most likely option, the Ox has the experience of playing big games and remaining composed in big moments. He will offer real midfield balance alongside Callum McGregor, and it's a tandem that has generally worked well. It does lack legs, which is a concern, but defensively, Celtic should be sound with that partnership.
Oliver Sorensen
Perhaps the second most likely option, Sorensen has come on in Baur's position, which effectively sees McGregor playing in a single pivot. The new boy has actually played pretty well there, while he struggled in the attacking midfield role during the week.
Luke McCowan
McCowan does have more of a defensive mindset than the two new boys, and he can hold his own physically. He had a stinker after coming on during the Champions League qualifier with LASK, but he has shown he is better than that in other games. He is not a likely option, but McCowan is an option.
Joel van den Berg
Van den Berg is another who has more of an attacking mindset, and yet to feature, it would be some baptism of fire to start him against Rangers in the Old Firm. This option is particularly unlikely for that reason.
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