Swansea City's Ashley Williams (left) and Manchester United's Robin van Persie (right) speak with match referee Michael Oliver (centre) during the Barclays Premier League match at the Liberty Stadium, Swansea. PRESS ASSOCIATION Photo. Picture date: Sunday December 23, 2012. See PA story SOCCER Swansea. Photo credit should read: Nick Potts/PA Wire. RESTRICTIONS: Editorial use only. Maximum 45 images during a match. No video emulation or promotion as ‘live’. No use in games, competitions, merchandise, betting or single club/player services. No use with unofficial audio, video, data, fixtures or club/league logos.