Chelsea's Gary Cahill, left, and Hull City's Ryan Mason and Hull City's Harry Maguire challenge for the ball during the English Premier League soccer match between Chelsea and Hull City at Stamford Bridge stadium in London, Sunday, Jan. 22, 2017.(AP Photo)
London: Hull record-signing Ryan Mason underwent surgery after fracturing his skull during a clash of heads during a Premier League match at Chelsea on Sunday.
The 25-year-old midfielder "is in a stable condition and is expected to remain in hospital for the next few days," Hull said in a statement.