Kalidou Koulibaly is a top target for Arsenal in the summer
Arsenal have splashed the cash over the last two transfer windows, spending in excess of £100million on Alexandre Lacazette and Pierre-Emerick Aubameyang.
The Gunners also added Henrikh Mkhitaryan to their ranks in January in a swap deal with Manchester United - with Alexis Sanchez going the other way.
And the north London club are not finished there, with reports in Italy suggesting Arsene Wenger has set his sights on Napoli duo Kalidou Koulibaly and Lorenzo Insigne.
CalcioMercato claim Arsenal sent scouts to watch the pair in action this week against RB Leipzig in the Europa League.
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Lorenzo Insigne is also on Arsene Wenger's transfer shortlist
Kalidou Koulibaly shows off impressive defence skills
The report says Koulibaly was the prime target as Wenger desperately seeks to strengthen his defence for the 2018/19 season.
The Gunners boss was heavily criticised for not addressing the club’s issues at the back in January and the Senegal international could be the solution.
Wenger is also said to have advised the scout to run the rule over Insigne who is a long-term target of the Arsenal boss.
However, the Italy international will be difficult to prise away from Napoli, having signed a new deal with the club last year until 2022.
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Leipzig forward Timo Werner is also said to have turned heads in the match, scoring twice as the German side ran out 3-1 winners.
However, CalcioMercato claim the Gunners will face a tough battle with Atletico Madrid for his signature who have been tracking him for some time.
Speaking earlier this month, Wenger admitted he regretted not signing defender in the January transfer market.
"Yes, because our defensive numbers are not good enough and that's where we needed some possible strengthening as well," he said.
“I believe we have to find an internal solution to our defensive problems, and that means everyone putting more effort in.”