Naomi Osaka kicked off her grass court season on Tuesday at the Berlin Open. It had been three weeks since her first-round exit at Roland Garros, and the results were the same today.

Four-time Grand Slam winner Naomi Osaka tumbled out of the Berlin Open first round on Tuesday after Russia's Liudmila Samsonova battled from a set down to win 3-6 7-6 (3) 6-4 on Tuesday.

Naomi Osaka (JPN) reacts after winning the first set against Liudmila Samsonova (not pictured) on day three of the Miami Open at Hard Rock Stadium.Geoff Burke-Imagn Images ...

Naomi Osaka's coaching experiment with Tomasz Wiktorowski is already showing promise. The four-time Grand Slam champion began ...

Naomi Osaka defended herself from the post-Montreal final controversy, insisting that she "completely forgot" to congratulate Victoria Mboko.

Tennis star Naomi Osaka took to social media to express how she felt after making this year's Canadian Open final.

Naomi Osaka’s path back to Grand Slam glory has hit yet another roadblock. The two-time US Open champion fell short in the second round of the DC Open to Britain’s Emma Raducanu in straight ...

Osaka extended an apology—and a congratulations—to the young Canadian, following the backlash to her 16-second runner-up speech.