The 24-year-old is back in Germany after a series of eye-catching displays in Austria for FC Salzburg, but how much do you actually know about the five-time champions' newest addition? bundesliga.com has unearthed ten facts about the man with the coiffed blonde quiff that may surprise you...
Kampl was born in Germany and made his name as a professional footballer in Austria, but, in footballing terms at least, he is actually Slovenian. Kampl hails from Solingen, North-Rhine Westphalia, but his parents are both Slovenian and moved to Germany from Maribor. "Part of my heart is in Germany because my whole family has so much to thank the country for," he told Red Bull magazine. "But the bigger part of my heart is Slovenian."
Kampl emerged as one of Europe's brightest talents in his two and a half seasons at FC Salzburg, with whom he won the Austrian domestic double in 2013/14. However, he endured a somewhat nomadic career in Germany before moving south of the border. After failing to break through at Bayer 04 Leverkusen, he spent time on loan at SpVgg Greuther Fürth and VfL Osnabrück, with whom a solid a 2011/12 season earned him a move to...
...VfR Aalen. A sensational start to his Bundesliga 2 career with the south-west club - he had two goals and two assists after four games - caused Salzburg to sit up and take note. Indeed, it even persuaded the Austrian club to trigger the release clause in his contract and Kampl was soon on his way to the Red Bull Arena after just two months in Aalen.
Despite leaving a club leading its domestic league for one languishing in second-bottom in the Bundesliga, Kampl's mind was made up as soon as he discovered Dortmund were interested in him. At his first media appearance for Borussia at their winter training camp in La Manga, Kampl revealed that he'd been a BVB fan since childhood. "This move is a dream come true for me," he said. "I've supported Dortmund since I was a boy."
Dortmund were not the only ones interested in signing Kampl, though. "It's no secret that Kevin is a very good player, someone who I could imagine doing very well with us," said Leverkusen coach Roger Schmidt - who knows Kampl well from his time at the helm in Salzburg - of the player's transfer. "They were in a position to make it happen and you have to congratulate him. Kevin can now move to the next level in his career and I hope he does. He's a top player and a great lad."
Away from the pitch, Kampl has several non-football related hobbies: he inherited a love of fishing from his father and uses the activity as a way of winding down after matches. On top of that he's also something of a petrolhead, with a long-standing love of sports cars, and is apparently even a whizz in the kitchen as well, modestly claiming: "My sauces are really good!"
He may have spent just two and a half seasons in Salzburg, but Kampl made one of the most significant impacts on Austrian football of any player in recent history. In addition to helping Salzburg win the league - by a margin of 22 points - and the domestic cup, he also won awards for the Austrian Bundesliga's Player of the Year in 2014 and Slovenian Player of the Year in 2013.
Kampl was eligible to play for both Germany and Slovenia but ended up plumping for the latter, where both his parents were born. After one goal in 17 appearances for the Slovenia U-21s, he made his senior international debut in a 2-1 friendly win over Cyprus in October 2012. He also started for Slovenia in their 3-1 UEFA Euro 2016 qualifying defeat to England at Wembley in November 2014.
BVB scored just 18 goals in 17 games in the Hinrunde, a return that was not only down to wayward finishing. In far too many games - and usually when Marco Reus was missing - they struggled for creativity in attacking areas. That is where Kampl will hope to make his mark, and his impressive record for Salzburg - 29 goals and 54 assists in 109 appearances - suggests he has the ability to do so. "Looking at Kevin's record, you see that he's more of a creator than a finisher," says Jürgen Klopp.
Kampl has two older brothers, Jackie and Denis, who would often help ferry him to and from training when he was growing up. He is also in a relationship with childhood sweetheart Vanessa, his partner of six years after meeting her 13 years ago. The attacking midfielder has a tattoo of her on his wrist.