The Gunners announced the signings of both Lucas Perez and Shkodran Mustafi on Tuesday.
The pair cost a combined total of £52m with former Deportivo La Coruna star Lucas the man charged with leading Arsenal’s frontline this season.
Wenger was keen to add more firepower up front to accompany Olivier Giroud, having made failed approaches for Jamie Vardy and Alexandre Lacazette.
With the deadline looming, Arsenal switched their attention to 27-year-old Lucas following his solid season in La Liga.
Meanwhile in defence, Per Mertesacker and Gabriel’s long term injuries left Wenger desperate for experience at the back.
Mustafi was chased for some time and the Gunners finally agreed a fee with Valencia to bring the Germany international to north London.
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Earlier in the summer, defensive midfielder Granit Xhaka was introduced for a hefty £34m, as were English youngster Rob Holding and Japan forward Takuma Asano.
The latter has been sent out on loan though since to Stuttgart, with another 13 players leaving Arsenal over the summer.
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Another deadline day departure was midfielder Glen Kamara who joined Colchester until January.
Elsewhere, Dan Crowley (Oxford), Jon Toral (Granada), Wojciech Szczesny (Roma), Joel Campbell (Sporting Lisbon) and Calum Chambers (Middlesbrough) all left on loan.
Permanently heading out of Arsenal were Serge Gnabry, Isaac Hayden, Mikel Arteta, Tomas Rosicky, Mathieu Flamini and Wellington Silva.
