Bayer Leverkusen have opened a five-point gap at the top of the Bundesliga, following a 3-0 win over Bayern Munich on Saturday. The victory represents a big blow to Bayern Munich’s bid to defend their title. Alejandro Grimaldo scored the second goal for Leverkusen, who remain the only unbeaten team in Europe. Grimaldo made it 2-0 shortly after half-time after Bayern loanee, Josip Stanisic’s first-half opener. Substitute Jeremie Frimpong added a third from range in stoppage-time with Manuel Neuer out of his goal. Bayer Leverkusen continue their Bundesliga title challenge next Saturday as they t…