Kai Havertz 'sorry' for Bayer Leverkusen amid furious Arsenal penalty backlash  The Mirror Arsenal saved by Havertz in Champions League but must improve  espn.in Havertz’s late penalty on return to Leverkusen rescues first-leg draw for Arsenal  The Guardian Bayer Leverkusen v Arsenal: Key points and match preview  BBC 'We weren't ready' - Mikel Arteta slams Arsenal players for 'lack of urgency' as Bayer Leverkusen give Gunners a taste of their own medicine with set-piece goal  Goal.com