Ann-Katrin Berger could be Germany’s first-choice goalkeeper at the Olympic women’s football tournament, after fighting back from thyroid cancer twice in the past years. Berger, 33, performed flawlessly in Tuesday’s 4-0 win over Austria and can now hope to also be between the posts next week Thursday when Germany play their first Olympic match against Australia in Marseille. Berger was diagnosed with thyroid cancer for the first time in 2017 and again in 2022. Merle Frohms has played at the last big events but Berger has been fielded several times by coach Horst Hrubesch who said that “the fin…