The full-back was forced off on Saturday during the Gunners’ 2-1 win over Wolves at Emirates Stadium.
Tomiyasu was therefore a doubt to face Luton at Kenilworth Road and he misses out on the squad completely - it is instead Ben White starting at right-back as the Englishman comes in as one of three changes.
White has had a knee niggle the past few weeks, but is fully fit now.
“After his injury and the way we decided to manage his load, he's feeling perfect and back to fitness,” Arteta said of White on Monday. “He played some minutes and he’s now in a good place.”
There is a change on the other side of defence too, as Jakub Kiwior starts at left-back, replacing Oleksandr Zinchenko. Kai Havertz is the other change, taking the place of Leandro Trossard in midfield. The German was on the bench against Wolves, but before that had scored two goals in as many games.
Time and date: 8.15pm on Tuesday, December 5, 2023
Venue: Kenilworth Road
Referee: Sam Barrott