Almost soon as Wimbledon announced it would ban Russian and Belarusian tennis players from this year’s tournament — a measure adopted by none of the other Grand Slams and condemned by the men’s and women’s pro tours — smart observers of the All England Club suggested one factor might have been fear of a British royal family member having to hand the trophy to Daniil Medvedev or Aryna Sabalenka while Vladimir Putin’s awful invasion of Ukraine rages on.