Mixed form for Arteta's Arsenal goes on in Sheffield U draw
Arsenal has won just one of five league games since Arteta took over as manager last month from interim coach Freddie Ljungberg.
A 1-0 loss to Sheffield in October played a big role in Arsenal's decision to fire Arteta's predecessor Unai Emery, but this time round Arsenal dominated the game from the start.
Without Aubameyang , Arsenal initially struggled to finish chances, with Martinelli twice slicing the ball wide off fine passes from Nicolas Pépé.
That changed in the 45th when Saka's cross from the left took a deflection off Sheffield full-back George Baldock and looped up before dropping perfectly to leave Martinelli a simple finish in front of goal.
Alexandre Lacazette started as center-forward but often played deep in midfield and was largely anonymous as his goalless streak extended to seven games in all competitions.
Arsenal could have had a penalty in the 68th when Jack O'Connell made contact with Pépé's legs, but the video assistant referee didn't recommend a spot-kick.
The result leaves Arsenal floating in midtable, closer on points to the relegation zone than to the Champions League spots, and four points off high-flying Sheffield.