Bundesliga and second-division matches in Germany on Saturday were again interrupted by fan protests against the entry of an investor into the German Football League (DFL). Tennis balls were thrown by fans onto the pitch at Wolfsburg against Borussia Dortmund at various points of the game and Darmstadt v VfB Stuttgart was held up for 18 minutes by the supporter protests. Hoffenheim’s Bundesliga match with Union Berlin was also interrupted twice in the first half due to fans hurling tennis balls onto the pitch, leading to the teams going back into the dressing room for almost 10 minutes. Fans a…