Please help with diagnosis

[Fusion_power]

That looks more like micronutrient deficiency but may be caused by an imbalance in NPK instead of an outright lack of micronutrients. We are indeed having problems with TSWV this year, to a level we last saw in 2008. I would watch these plants closely and if they show signs of slowing growth and yellowing leaves, then take more pics and let us look at them.

http://customers.hbci.com/~wenonah/min-def/tomatoes.htm

DarJones