Cologne - As a conveyor belt for young talent, the Bundesliga is unmatched worldwide. Germany reaped the benefits with success at the 2014 FIFA World Cup, while some of the top-flight's youngsters have been leaving quite the mark in international age-group sides this summer.

Over the course of this five-part series, will run the rule over 25 players of 20 or under, all of whom are set to make an impact in 2015/16. Here's part 3 of our feature special...

Gianluca Gaudino

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Date of birth: 11/11/1996

Club: FC Bayern München

Bundesliga appearances: 8

Son of former Germany international midfielder Maurizio Gaudino, Gianluca's job prospects were always limited to one: being a footballer. That he would make the grade so soon, and in so impressive a fashion, however, was less easy to predict. "Gianluca has something which is very difficult to learn," said Bayern sporting director Matthias Sammer after the then 17-year-old's Bundesliga debut against VfL Wolfsburg on Matchday 1 last season. "He simply knows how to play football." The calm schemer will be hoping for more playing time next term, however, after managing just eight top-flight appearances last season.

Carlos Gruezo

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Date of birth: 19/04/1995

Club: VfB Stuttgart

Bundesliga appearances: 16

Another son of a former footballer, and another central midfielder. Where Gaudino stands out for the preciseness of his passing, though, Gruezo catches the eye with the tenacity of his tackling. Already capped nine times by Ecuador, including twice at the FIFA World Cup in Brazil last year, the 20-year-old netted a maiden Bundesliga goal in Stuttgart's 4-1 win over SC Freiburg on Matchday 13 last season. With an excellent work ethic, a tidy passing game and a disciplined positional sense, Gruezo, who joined VfB in 2014 from Barcelona SC after winning the Ecuadorian title with the Guayaquil-based outfit, could play a key role this season as the Swabians look to avoid any further dalliances with the drop.

Timo Baumgartl

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Date of birth: 04/03/1996

Club: VfB Stuttgart

Bundesliga appearances: 20

His professional debut only came on Matchday 11 of the 2014/15 Bundesliga campaign, but as soon as Baumgartl stepped onto the pitch against SV Werder Bremen, the looked assured. Unflustered in possession, powerful in the air and with a reading of the game beyond his 19 years, the centre-half went on to make 19 further appearances as the Swabians beat the drop on the final day. Along with being a five-time Germany U-19 international, Baumgartl is every inch the modern defender. "As a centre-half in modern football, you’re basically the side's first playmaker," he told Bild in February. Expect a first top-flight goal to follow soon enough.

Levin Öztunali

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Date of birth: 15/03/1996

Club: SV Werder Bremen

Bundesliga appearances: 31

Grandson of German legend Uwe Seeler and cut from the same attacking cloth, Öztunali played for Hamburger SV at youth level before moving to Bayer 04 Leverkusen in 2013. Of German-Turkish stock, the 19-year-old, who has represented die Nationalmannschaft from U-15 to U-20 level, also featuring at the recent FIFA U-20 World Cup, became the first player born in 1996 to make his top-flight debut when he was brought on in Leverkusen's 3-1 win over SC Freiburg in August 2013. On loan at Bremen until June 2016, Öztunali netted his maiden Bundesliga goal on the final day of last season.

Niklas Süle

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Date of birth: 03/09/1995

Club: TSG 1899 Hoffenheim

Bundesliga appearances: 42

With 42 Bundesliga appearances, as well as representing every German age group level since the U-16s, the centre-half is a veteran by the standard of most of his contemporaries. Yet Süle knows that his appearance list should be significantly longer. Chasing a ball into the corner in a home clash with Eintracht Frankfurt on Matchday 15 last season, the 19-year-old collapsed awkwardly on his left leg, suffering serious knee ligament damage. Back in training ahead of the new campaign, the powerful defender will be aiming to make up for lost time.

Ones to watch - Part I
Ones to watch - Part II
Ones to watch - Part IV
Ones to watch - Part V