I think Thomas at post #11 has given a spoiler.
Overall, found today rather difficult and I am with Simond9x on the clunkiness of using The Observer interface on my device. It really is a bit of a mess. And I am sure I could adjust settings (again!) if I had a PhD in that sort of thing but cannot face it.
All that said, rather grumpily, I liked 20a, 4d and 7d tells me again that our setter is a tennis fan. We've seen Nadal and Agassi in recent weeks and today's gives another.