South Korean newcomer hasn't made his debut yet, but the European giant has already raked in money.

Lee Kang-in has yet to feature for Atletico Madrid, yet he has sparked a frenzy in Spain. MARCA reports that the Korean midfielder tops pre-debut jersey sales, delivering a positive boost to the club's image and revenue.

Lee Kang-in still hasn't worn the Atletico Madrid shirt in an official match, but he has created a buzz in the commercial market of the Spanish capital club. According to the newspaper MARCA, the South Korean midfielder has impressive jersey sales right after completing the transfer from Paris Saint-Germain, showing the huge appeal of this contract to fans.

Joining Atletico Madrid on a five-year contract this month, Lee Kang-in was given the number 7 jersey once worn by legend Antoine Griezmann, who has now moved to Orlando City SC. Even before debuting for his new club, the South Korean star has continuously made commercial impacts. Notably, MARCA affirms that this is the most attractive contract for Atletico in recent times.

According to the Spanish newspaper, "Lee Kang-in is the player with the highest jersey sales before his Atletico Madrid debut." This achievement becomes even more remarkable as MARCA emphasizes: "Lee Kang-in is the most impactful signing. The jersey sales numbers from the very beginning prove that. Even a star like Julián Álvarez has never sold so many jerseys before officially joining the club."

The effect from Lee Kang-in is not limited to fan interest but also brings significant financial benefits to Atletico Madrid. MARCA stated: "This effect has been converted into increased revenue for the club." However, the Madrid club has not yet disclosed the number of jerseys sold nor the specific revenue generated by the South Korean international.

Although the transfer deal is completed, Lee Kang-in has not yet joined Atletico Madrid. Because he has to handle administrative procedures related to mandatory military service in South Korea, he is training individually at home. If everything goes according to plan, the midfielder's debut will come in the match against Manchester City in the Coupang Play Series on August 9.

Not only creating a strong commercial effect, Lee Kang-in also receives great expectations from Atletico Madrid's management and fans. MARCA concluded: "The fact that Lee Kang-in was given Griezmann's number 7 jersey is a sign that Atletico Madrid expects him to take on a particularly important role in the team." This shows that the South Korean newcomer is being regarded as one of Atletico's most anticipated faces ahead of the new season.