This is the view of talkSPORT's Gabby Agbonlahor, with Alan Brazil agreeing the team is missing a classic no.9.
Arsenal are nine points off the top of the Premier League and Agbonlahor believes big change in the attacking part of the pitch is needed.
He went on to suggest that Mikel Arteta should look to Newcastle for the solution to their problems, or they could fall even further away from the pack.
"They're too reliant on [Bukayo] Saka. [Gabriel] Martinelli will turn up one game out of five," Agbonlahor said on Breakfast.
"Havertz doesn't look to me like he's that leader that you want up front. They miss a striker," Brazil agreed, adding that they need a goalscorer that they can rely on.
READ MORE FOOTBALL
Ex-Chelsea coach says Kai Havertz has NOT improved since joining Arsenal
Kai Havertz on cusp of making Arsenal history as he closes in on Henry's all-time record
"Arsenal are dying for an Isak", Agbonlahor later said.
"He can hold the ball up, he's strong, he's aggressive, he's quick in behind and he can score every type of goal.
"Havertz is getting bullied, you don't know where he's playing. The Chelsea game he was so poor."
"Arsenal, if they don't make a top striker sign in January, I don't think they're going to be up there," Agbonlahor added.
Most read in Football
Amorim set for first game in charge of Man United - predicted line-up and how to follow
Roy Keane's outrageous one-liner to Jill Scott sparks Gary Neville spit-take
Robert Lewandowski leaves Rio Ferdinand heartbroken with Man United transfer revelation
Reece James suffers fresh Chelsea setback after 271 days out injured
Havertz, who joined the Gunners last summer from Chelsea in June 2023 for £65million, has scored four goals in the Premier League this season and once in the Champions League.
Isak has also netted four times in the top-flight so far - including one in the 1-0 victory over Arsenal at St James Park earlier this month - as well as assisting two more.
Isak joined Newcastle for a fee understood to be in the region of £63 and finished last season with 21 goals for Eddie Howe's side.
The Gunners are on a four-game winless run, last drawing 1-1 with Chelsea at Stamford Bridge before the international break.