Thanks CD I wasted half an hour on this last night but it's good fun - many of the questions weren't that hard, some of the others could be worked out with a bit of judicious googling if you had an idea of what the answer might be and a few were pure guesswork.

I had the most trouble with questions 10, 11, 16 and 23 ... and 24 until I had another look while putting my answers into an email just now and kicked myself! (last night, I'd been thinking singles players)

One that I thought I ought to know the answer to but didn't was ...

10. How is it determined who will sit in which courtside players chair for a match?

a. first on, first choice, except for seeded players
b. first onto the court selects where he or she sits
c. it is pre-determined for main stadium matches
d. first on chooses, but host country players have preference

It strikes me there must be a rule otherwise we'd see some fighting given how superstitious some players are but no such rule is mentioned in the ITF, ATP or WTA rulebooks, as far as I can see. Having said that, doesn't the higher-seeded player tend to walk onto court first at slams? In which case b in effect turns into a. Hmm - if I can be bothered before sending, I might look at the start of a random Nadal match at Wimbledon match and see what happened there.

Also, in question 23, I'm convinced I recognise one of the players in the photo but none of his possible partners look remotely like the other player. Then again, if I'm right about the player I think I know, the photo must have been taken 15-20 years ago.