Sommer has been vital to Borussia Monchengladbach becoming one of the best teams in the Bundesliga .
Swiss goalkeeper Yann Sommer , 26 , has proven there is life after Marc - Andre ter Stegen .
goalkeeper has been vital to Borussia Monchengladbach becoming one of the best teams in the Bundesliga .
Swiss goalkeeper Yann Sommer , 26 , has proven there is life after Marc - Andre ter Stegen .