Six years ago, the exhibition of Mucha’s posters in the Municipal House in Prague was one of the most popular events in the capital, attracting 185,000 visitors, and the most visited art exhibition in the Czech Republic of 2013. It drew attention also because of Lendl, 59, one of the most successful Czechoslovak tennis players, who fled the Communist Czechoslovakia in 1986 and settled down in the United States.