practically yes it's a multiple-choice poll and one can choose as many or few ones as one wants, however considering the logic of the competition so far and that I'm afraid that tactical vote may get too much importance here, I think choosing around 4 would be most correct (I personally voted for 3 ones because I couldn't decide the 4th one between several of them)
Yes, but if people want to vote more there is no physical way to stop such behavior. I too recommend 3 or a max of 4 choices, but if anyone can vote for all and wants to vote for all...
This multiple choice will yield "the least disliked" tennis player, and not "the most favorite"
The title should be changed
I have not invented this competition, just continued it, and I have also chose the most voted for Final format. People need to stop complaining, vote or not vote, and invent their own competition with their own format if they are not satisfied. Thank you and pleasant voting...