Manchester City's strikeforce also one which makes Laurent Koscielny jealous.
Laurent Koscielny has been discussing Arsenal's need to improve their squad next season, and believes they are currently weaker in terms of depth than their rivals.
The Gunners have just seen Bacary Sagna depart, and only have Thomas Vermaelen as cover for Mertesacker and Koscielny himself, with even the Belgian linked with an exit.
That's just central defence, with a new right-back needed to replace Sagna, and a specialist defensive midfielder is still required to share the load with Mathieu Flamini, with Arsene Wenger resting the veteran at key points last.
Then there is the issue of the left side, with no orthodox left winger in the squad and a lack of pace evident with no Theo Walcott in the side. Another goalkeeper needs to be bought to replace Lukasz Fabianski, who has joined Swansea.
Olivier Giroud being the only senior striker is the top of the priorities though, with the Gunners trailing their rivals in the goalscoring charts.
Koscielny is adamant the Gunners need to improve and believes the club's rivals have an advantage over them due to their superior squad depth.
He told the Associated Press: "We need to recruit a very, very good striker, because it’s important for us, for competition for places, because Olivier needs that to become even better.
"Having a striker who scores more than 30 goals a season can help us win the Premier League.
"Compared to the squads like Manchester City, even United, Chelsea, you can see there’s a certain difference."
Koscielny's admiration for Manchester United's squad emphasises just how poorly the Red Devils performed last season, and that the Gunners are not likely to be discounting them as challengers next season.
United on paper have stronger strike options, with Robin van Persie, Wayne Rooney, Danny Welbeck and Javier Hernandez.
The table below emphasises just how far the Gunners are falling short - a list of the number of Premier League goals from the four teams discussed in 2013/14, scored by strikers only:
That more than anything illustrates that Arsenal need a 'very, very, good striker', who should be aiming to get close to the tally of their rivals all by himself.