Rapper Nina Chuba, performing at a concert in Hamburg on Wednesday evening, let it be known that Florian Wirtz, a midfielder for Bundesliga champions Bayer Leverkusen, will be part of the country’s European Championships squad. The audience cheered as Wirtz, 21, announced his nomination via a video clip. “I’m delighted to have been nominated and of course I’m already looking forward to the summer,” said Wirtz, wishing the concert-goers a great evening. After an outstanding season with the Werkself, Wirtz is regarded as one of the German team’s greatest hopes for the European Championship. The …