Champions Bayer Leverkusen won 4-1 at Hoffenheim on Saturday to get their Bundesliga title defence back on track thanks to Victor Boniface’s impressive double. Leverkusen, who went through the whole of the last Bundesliga campaign unbeaten, lost last time out at home to RB Leipzig but a flying start in Hoffenheim helped them bounce back straight away. The Red Bulls drew 0-0 at home to Union Berlin, with Loïs Openda missing a penalty for the hosts and both coaches missing from the bench given Marco Rose was suspended and Bo Svensson ill. Borussia Mönchengladbach, marking club icon Günter Netzer…