Adam Matthews has taken to social networking site Twitter to thank the Celtic fans for their support over the last four years.
Matthews played for Celtic for four years after moving to the Glasgow giants from Welsh outfit Cardiff City in the summer of 2011.
During his time at Celtic Park, the Welshman won the league title four times and established himself as one of the better players in Scotland.
The 23-year-old has taken to Twitter to show his appreciation for the Celtic fans and is looking forward to having s successful time at Sunderland.
Would like to thank everyone at @celticfc the coaches and defiantly the fans for their support over the last 4 years would have been amazing— Adam Matthews (@Adam2Matthews) July 9, 2015
Wishing the club all the best in the future. Now I am looking forward to a new challenge with Sunderland. Thanks for everything.— Adam Matthews (@Adam2Matthews) July 9, 2015
Sorry about the typo meant to say who have ha— Adam Matthews (@Adam2Matthews) July 9, 2015
Matthews will now be determined to show his quality in the Premier League and take his game to the next level.