Kei Nishikori is widely considered the greatest male Japanese tennis player of all time and has amassed an impressive net worth because of it. We’ll be taking a closer look at Nishikori's net worth in this piece.

One look at his impressive career resume and you’ll see why he deserves to be ranked 15th all-time in earnings ($23,854,728) among tennis players in the Open Era.

Kei Nishikori's net worth in 2020 (estimate): $24 million

Kei Nishikori currently has a net worth of about $24 million in 2020. The 30-year-old Asian superstar is ranked 40th on Forbes’ list of highest-paid professional athletes for 2020, with $32.1 million in earnings. The majority of that came in the form of $31 million in endorsements.

While Nishikori is certainly raking in the big bucks, he still is a bit behind his more high-profile contemporaries. Roger Federer is No. 1 on that Forbes list with 106.3 million in earnings for 2020, with Novak Djokovic ($44.6) at No. 23 and Rafael Nadal at No. 27 ($40 million). Naomi Osaka (No. 29, $37.4 million) and Serena Williams (No. 33, $36 million) lead the women's side.

After representing Adidas for over a decade, Nishikori signed with Nike in 2017. The sports titan honored Kei’s accomplishments with the NikeCourt Air Zoom Vapor X LTR PE tennis shoes.

Kei is also partnered up with several brand giants, including food company Nissin, automobile staple Jaguar, Japan's flag carrier Japan Airlines, electrical manufacturing company Asahi, communications giant NTT, housing company Lixil, and multinational company Procter & Gamble.

He's such a beloved figure around the world that Jaguar made a special “Kei Jaguar edition,” while Nissin also came up with “Nishikori noodles.” Japanese Airlines also introduced a Kei-branded plane, while Asahi unveiled the Nishikori alcohol-free beer.

Nishikori was also named global ambassador for Uniqlo in 2011 and rocked the brand during the 2019 French Open. Moreover, Kei is secured for the foreseeable future with his lifetime deal with Wilson, which he signed in 2015.

Like most professional athletes of this generation, Nishikori has also been able to maximize his massive social media following. He often posts products and services from his brand partners, which further fattens his already inflated bank account. Nishikori currently has 1 million followers on Twitter and more than 500,000 on Instagram.

Nishikori certainly had to grind to achieve the spoils of his hard work and dedication to the sport. He made history back in the US Open in 2014 when he became the first Asian player to make a men's Grand Slam final.

Kei also brought a lot of pride to his country when he won the bronze medal at the Rio Olympics — the first tennis medal for the Land of the Rising Sun since 1920.

Nishikori, who now resides in Bradenton, Florida, has reached as high as No. 4 in men’s singles ATP rankings (2015). He's also the first Japanese men’s tennis player to have been ranked in the top five in this category.

The Japanese sensation actually flew under the radar when he won his first ATP title at the Delray Beach Open in 2008. The executive director of the Delray Beach Open, John Butler, recalled how the once unheralded tennis player blossomed into a full-blown star:

“Even at that stage when he was relatively a no one in the tennis world, he knew how to step up at the big moments,” said Butler. “He knows how to execute, that’s why he’s been so steady in his climb.”

Al in all, Kei has claimed a total of 12 ATP titles so far. His notable rivalries include Stan Wawrinka, Milos Raonic, Marin Cilic, and David Ferrer.

After his rise to relevance in 2016, Nishikori experienced a rough spot the following year when he sustained a right wrist injury. Further scans revealed a tear in one of the tendons, which ultimately scratched his season. The inactivity forced him to drop all the way to No. 22 in the rankings — the lowest of his career since 2012. He bounced back beautifully in 2018 and got back to the top 10. He finished 2019 at No. 13 in the rankings and is at No. 35 in 2020.

With Japan initially set to host the Summer Olympics in 2020, Nishikori was expected to be one of the host nation's biggest stars for the sporting spectacle. The pandemic, however, pushed the event to 2021. Nishikori himself dealt with COVID-19 as he tested positive twice this year.

Nishikori, however, has shown great resilience throughout his career and is expected to make a splash once more in the coming years. His undeniable star power will likely net him more sponsorship opportunities and a chance to grow his net worth even more. At age 30, Kei Nishikori still has a lot more career left and a lot more money to earn.