Watermelon laced with Plum juice

I had a ripened water melon at home. To counter that over ripe taste, I blended some plum juice as well. Cut a few tiny chunks of plum as well and tossed it into the glass. Please do not add any sugar, this has natural sugar from the sweetness of the watermelon. Just decorated it with a sprig of mint. Yummy on a hot and sunny day!