Bundesliga chief executive Donata Hopfen is enthusiastic about Sadio Mané and Mario Götze joining Bayern Munich and Eintracht Frankfurt. “The league needs such stars and big names,” Hopfen said on Thursday at the Horizont Congress in Frankfurt, according to Sportbuzzer. The duo are “a great calling card for the league,” she added. Senegalese Mané and Germany’s 2014 World Cup winner Götze have both joined their new clubs for three years from Liverpool and PSV Eindhoven respectively. They could go head-to-head when Frankfurt host Bayern in the Bundesiga season opener on August 5. Hopfen expresse…