MOENCHENGLADBACH, GERMANY - NOVEMBER 25: Thorgan Hazard #10 of Borussia Monchengladbach celebrates after scoring his team's first goal  during the Bundesliga match between Borussia Moenchengladbach and Hannover 96 at Borussia-Park on November 25, 2018 in Moenchengladbach, Germany.  (Photo by Koji Watanabe/Getty Images,)

7 Players Borussia Dortmund Should Sign in the 2019 January Window

Historically, Borussia Dortmund aren't big spenders when it comes to the January transfer window, even though two of the club's three biggest sales - including Christian Pulisic to Chelsea - have taken place during the winter.

The Black and Yellows record singing during the winter break came last season when Manuel Akanji was brought in from Swiss giants FC Basel.

But with Lucien Favre's side now rolling around in moolah following Pulisic's departure, here are seven deals which Borussia Dortmund should complete this month.

1. Thorgan Hazard - Borussia Mönchengladbach

While Christian Pulisic has gone to Chelsea to fill the boots of Eden Hazard, the Belgium international's younger brother looks set to move to Borussia Dortmund to replace their young American.

Since joining Borussia Mönchengladbach, Thorgan Hazard has grown into one of the most influential players in the Bundesliga and he would undoubtedly be welcome addition - or upgrade, depending on which way you look at it - for the Black and Yellows.

The deal will probably be put off until the summer, but there's no reason why Dortmund couldn't test the waters before the start of the Rückrunde.

2. André Onana - AFC Ajax

Few would argue that Roman Bürki has been one of the best goalkeepers in the league this season, but the Swiss shot-stopper still seems to be the only thing stopping Borussia Dortmund really having a chance in the Champions League.

Up and coming star in between the sticks are few and far between, but Ajax's André Onana is already being tipped for greatness in Europe.

On top of his most recent development in Amsterdam, Onana spent his formative years at the Samuel Eto'o Academy in Cameroon before joining Barcelona's academy in 2010 where he stayed until Ajax came calling five years later.

3. Achraf Hakimi - Real Madrid

Borussia Dortmund have been on the hunt for a long-term replacement to Marcel Schmelzer for some time, and this season they've appeared to have stumbled onto a gem in the form on Real Madrid loanee Achraf Hakimi.

The Moroccan initially signed as a right back, but he's come into his own since switching wings and has now cemented his place in Lucien Favre's first team.

Dortmund's top brass have already expressed their desire in making Hakimi's more permanent, and Los Blancos could be tempted into a sale if their price tag is met.

4. Valentino Lazaro - Hertha BSC

While Hakimi has been doing the business at left back, there are still some questions over who will replace Łukasz Piszczek on the other side of Borussia Dortmund's defence.

Both Jeremy Toljan and Felix Passlack have fallen by the wayside in recent years, so the club could be tempted to poach a new defender from one of their Bundesliga rivals.

While Hertha BSC's Valentino Lazaro isn't a natural right back, he's form in that position under Pál Dárdai this season has been bettered only by Bayern Munich star Joshua Kimmich, and the Austrian would certainly welcome a move to the Westfalenstadion.

5. Jann-Fiete Arp - Hamburger SV

Paco Alcácer might be the top goalscorer in the Bundesliga this season - level with Eintracht Frankfurt's Luka Jović on 12 goals - but Lucien Favre is currently being made to use Mario Götze as the Spaniard's understudy.

That's because the likes of Alexander Isak and even Maximilian Philipp aren't deemed to be good enough to fill in when the former Barcelona striker needs a rest.

One man who could come in and act as Alcácer's protégé is Hamburger SV striker Jann-Fiete Arp. The teenager already has top flight experience with Der Dino, and he's already captain Germany at Under-19 level.

6. Callum Hudson-Odoi - Chelsea

Clubs like Borussia Dortmund are only able to improve thanks to their continued recycling of young players, like Ousmane Dembélé and most recently Christian Pulisic.

Next on their radar could be Chelsea's Callum Hudson-Odoi, a player who is currently on the radar of Bayern Munich. Although it's a nice story, Borussia Dortmund are fairly well off in terms of young, exciting wingers, and they'd only really make a big money singing if it was an improvement on their current options.

7. Julian Brandt - Bayer 04 Leverkusen

Although Callum Hudson-Odoi might not bee seen as an upgrade on Danish winger Jacob Bruun Larsen, Bayer Leverkusen star and Germany international Julian Brandt would.

The 22-year-old has struggled under Heiko Herrlich - who has now been replaced by former Dortmund manager, Peter Bosz - this season and with his contract at the BayArena running down, could be tempted into a switch in the near future.

Any move for Brandt would see Borussia Dortmund forced into breaking their current transfer record, but the likes of Michael Zorc and Hans-Joachim Watzke could be tempted to secure one of Germany's most exciting young players.