Naomi Osaka is really going through it after her first-round exit from the French Open ... not only did she show off the current state of some gnarly blisters on her hand -- she also expressed her desire to take a break from tennis altogether.
The 27-year-old star put her injuries on display on Thursday ... saying she can't fully bend her fingers due to vesicles on her knuckles.
After losing to Paula Badosa in three sets on Monday, Osaka revealed she's been dealing with the ailment since the Italian Open earlier in the month .