Bochum won 4-3 in a classic at Bundesliga relegation rivals Union Berlin on Sunday to move away from the drop zone and give Cologne a glimmer of hope of staying up. At the other end, recently crowned champions Bayer Leverkusen extended their unbeaten run in all competitions this season to 48 games – a joint European record with Benfica – after a 5-1 triumph at sixth-placed Eintracht Frankfurt. Hugo Ekitiké nodded in to cancel out Granit Xhaka’s early curler but Patrik Schick’s towering header, a penalty from Exequiel Palacios Jeremie Frimpong’s counter-attack goal and Victor Boniface’s late sp…