He's been training with us and he is available to participate." Tierney has not played for Arsenal since a substitute appearance in their penal

Arsenal defender Kieran Tierney will be in Mikel Arteta’s squad to face Sporting CP on Tuesday, according to a report.Photo by ANGELOS TZORTZINIS/AFP via Getty ImagesIsaan Khan of the Daily Mail

We told you last week how former Celtic left-back Kieran Tierney returned to training with Arsenal's first team. He has now taken the next step in his recovery.

Boss Arteta confirmed that the defender is contention to be involved at the Estádio José Alvalade. He said: "Everybody in the squad is fully fit and available to start the game. We have Kieran Tierney after a long injury, it’s great news that he’s back, he’s been training with the team and he’s at the level to participate."

Tierney has now been in full training with the team for the last week, following his recent return to fitness. But this will be his first appearance in an Arsenal squad since his