Compared to the other sub forums the tennis forum is a ghost town. You'll notice very few keep long tracking threads. The sheer volume of tennis across ATP, WTA, and challengers makes it tough. Plus I'd imagine most SBR members are in North America which is typically awful throughout the year for tennis wagering with the time difference.
I miss my boy matt1216, guy was all over the place. I remember kenz having a good run.
Tennis is tough, you really need to focus on a specific area (ATP/WTA/challenger) or a specific bunch of players and go from there.