I agree with the above. Looks like Late Blight.
Leaves infected with Late Blight develop water-soaked patches that turn brown. In humid weather there may be a white, downy growth on spots. Over time the spots expand rapidly and become brown to purplish- black as tissue dies. Plant may look “frosted”.
Fruits can be affected at any stage. Large irregular, rough, brown-green lesions can be found on the fruit. The disease (which is devastating
in potatoes) can also cause severe losses in tomatoes when conditions are favourable (cool, wet weather) resulting in severe defoliation.
For more info check out this site: Best Juicy Tomatoes