Team needs: 3 more moves Borussia Dortmund should make in the transfer window

Borussia Dortmund wasted no time reinforcing its ranks ahead of the 2016-17 Bundesliga campaign.

It had become all too familiar to see players leave the Westfalenstadion for better opportunities in recent years. The trend continued this summer: Mats Hummels ditched Dortmund for Bayern Munich, Ilkay Gundogan joined Pep Guardiola at Manchester City, and Henrikh Mkhitaryan forced a move to Manchester United.

But sporting director Michael Zorc made sure his team would remain competitive. In came young talent, including the likes of Ousmane Dembele, Emre Mor, Raphael Guerreiro, and more established German names in Mario Gotze and Andre Schurrle.

Dortmund, for once, could enjoy the transfer market.

It would seem that the club's work is finished. Spending more than €100 million on eight signings would indicate as much.

Let's just push the envelope a bit and assess what else Dortmund could do to beef up a challenge against Bayern.

A true replacement for Gundogan

When he wasn't recovering from injury, Gundogan was one of the Bundesliga's finest passers. Dortmund couldn't keep hold of the player, but more importantly, it hasn't found a sufficient replacement. Sebastian Rode arrived from Bayern with a reputation for tough-tackling football, and although he can play the role of the distributor, he's not on the same level as Gundogan.

Julian Weigl looks to be ready to assume more minutes, but he would be better off with an experienced defensive midfielder by his side. Considering Gonzalo Castro has more of an attacking edge, it's hard to envision the 29-year-old as an ideal partner in a holding role.

Dortmund's so well rounded with cover in virtually every outfield position, and its attacking potential is its clearest strength. Opponents could only hope to get behind the midfielders and test the defence.

That's why BVB would be best served to target a Bundesliga regular like Lars Bender or Luiz Gustavo - someone manager Thomas Tuchel can trust to protect a potential centre-back partnership between Marc Bartra and Sokratis Papastathopoulos.

Potential targets: Lars Bender (Bayer Leverkusen), Luis Gustavo (Wolfsburg)

Competition for Burki

Roman Burki emerged as Dortmund's first-choice goalkeeper last season, relegating 35-year-old veteran Roman Weidenfeller to the bench. The problem is that Burki didn't always exude confidence in goal. He made some excellent saves last season, but he would undo his work with costly mistakes. The howler against Paderborn was, fortunately, only a slight blemish on a 7-1 victory, but it showed he's prone to error.

Another experienced netminder could help the situation. Some of the biggest clubs in the world have three capable goalkeepers in the squad - Paris Saint-Germain, for one, made sure to stock up over the past two campaigns - and if Dortmund really wants to compete for the Bundesliga crown, it has to have some depth in the position.

Potential targets: Diego Lopez (AC Milan), Asmir Begovic (Chelsea), Samir Handanovic (Inter)

Figure out how the pieces fit

Tuchel's main task over the next few months, however, is about putting everything together. Dortmund's already made so many moves that any more could risk unsettling the environment. There's going to be a lot of competition in several positions, and potentially some unhappy players. What happens to Shinji Kagawa and Christian Pulisic will be an interesting development.

Tuchel will likely opt to use a 4-2-3-1 formation, which would allow him to field Schurrle, Gotze, and Marco Reus up front and Pierre-Emerick Aubameyang at the top.

If everything works out, Dortmund will no doubt scare defences of every kind.