Bayer Leverkusen are gunning for revenge on Thursday when they travel to a second Europa League semi-final against Roma in as many years after yet another late escape kept their remarkable unbeaten run intact. Xabi Alonso's Leverkusen staff were filmed celebrating Roma's passage past AC Milan in the last eight, and Thursday's first leg at the Stadio Olimpico is a chance to purge the memory of being 'Mourinhoed' in last season's last four. Already a formidable proposition last term, Leverkusen's astonishing run of 46 matches without defeat and a first-ever Bundesliga title has them favourites to reach the final in Dublin.