A 56-year-old Pompey fan was attacked by a group of men at around 10:15pm, the victim suffered a broken jaw and after treatment at the Walsall Manor Hospital is continuing his recovery at the Royal Surrey Hospital in Guildford.
Anyone with information should call West Midlands Police on 101 (if in the region) or contact the British Transport Police on 0800 40 50 40 quoting refrence number '79 05/01/13'
Information can also be given anonymously to Crimestoppers on 0800 555 111.