**_Tonight, Arsenal host French side AS Monaco in the Champions League at the Emirates._**
Arsenal are currently dealing with a defensive crisis. During yesterday's open training session it was noted that as many as seven players did not participate.
Gabriel, Calafiori, Zinchenko, Timber and Partey were all absent from training. Ben White and Takehiro Tomiyasu remain long-term absentees.
This leaves Mikel Arteta potentially forced to assemble an entirely new back line for tonight's game against Monaco.
One player expected to start tonight is Kieran Tierney, who is now back from injury and ready to play again.
Despite Tierney's anticipated minutes for Arsenal tonight, the most likely scenario is that the 27-year-old Scotland international will leave the club in January on loan.
Arsenal journalist Charles Watts has told [**_Sports Mole_**](https://amp.sportsmole.co.uk/football/arsenal/transfer-talk/news/arsenal-transfer-exclusive-tierney-exit-decision-nailed-on-after-arteta-lifeline_560256.html) that Kieran Tierney has no future at Arsenal and that the player will move to another club in January, provided he stays fit.
A loan move seems the most likely outcome this winter, with expectations that Tierney will leave Arsenal permanently in the summer.