Identify this tomato problem

[widespreadpanic]

My friend has soil grown tomatoes that has a problem. It's interesting b/c the plant is a Sungold and I have a clone from the same plant. My plant was removed from my hydroponic system recently b/c it never recovered from a droopy/wilty' leaf problem.

His Sungold plants leaves now looks like this:



It's the only plant that seems affected. I told him I could post it to the forums to find out what is up. I recommended immediate removal but he doesn't want to b/c it as "healthy" looking fruit developing.

What do you think is going on?