Bayern Munich crashed 3-1 at mid-table Mainz a week after clinching a 10th straight Bundesliga title and second-placed Borussia Dortmund also lost on Saturday, 4-3 at home against Bochum despite an Erling Haaland hat-trick. Freiburg won 4-3 at Hoffenheim to move into the fourth and final Champions League spot, pending RB Leipzig’s trip to Borussia Mönchengladbach on Monday, when third-placed Bayern Leverkusen also face Eintracht Frankfurt. Roland Sallai netted on 23 minutes with Freiburg roared on by noisy fans but Andrej Kramaric levelled. Angelo Stiller and Freiburg skipper Christian Günter …