Leaders Bayer Leverkusen defeated 10-man Union Berlin 1-0 on Saturday and could claim their first-ever Bundesliga title next weekend at home against Werder Bremen. Florian Wirtz scored the winner shortly before the break to give Leverkusen a 16-point advantage over second-placed Bayern Munich, who were up 2-0 but conceded a shocking 3-2 defeat to promoted Heindeinhem. Leverkusen, who are unbeaten in all their 41 season matches and a record-equalling 28 in the Bundesliga in 2023-24, can end the title race with a home win against Bremen next Sunday, no matter the result of Bayern v Cologne on Sa…