MUNICH, April 14 — Bayern Munich defender Raphael Guerreiro struck a brilliant second-half goal and Thomas Mueller scored late to beat Cologne 2-0 on yesterday, delaying Bayer Leverkusen’s Bundesliga title party to today at the earliest.

Bayern’s win means Xabi Alonso’s Leverkusen, who are 13 points clear of the Bavarians, need to beat Werder Bremen at home on Sunday to lift the Bundesliga trophy for the first time.