Chelsea have held talks with Welshman, three years since Celtic fans celebrated his exit hitc.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from hitc.com Daily Mail and Mail on Sunday newspapers.
Celtic could not build on a dominant start to their Champions League contest against Shakhtar Donetsk as they were held to a frustrating 1-1 draw in Poland.